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[Q] HTC Sensation WiFi Error

Hi,
I am new to the forum and appreciate your help
I did a OTA update to 1.35.707.1 after which i cannot turn on WiFi. It tries to turn on after which it indicates error.
Please suggest a solution for this......is it possible to roll back to the previous software version of 1.28

Try a factory reset. Go to settings, SD & Phone storage and click on Factory data reset. Keep in mind this will erase everything on your phone.

Tried a factory reset...still not successful.
Is it possible to downgrade ROM to version 1.28.....

I experienced this exact same problem today when helping a customer with their HTC sensation. I tried the Factory Data Reset as well and still got the same error. The only solution I found was to tell the customer to contact customer support to get a replacement unit. I'm not sure if it is a software issue of if there is some issue with the wifi antenna in the device itself.

Damn, I have the same issue, how long does the warrenty cover the unit for? Can you just walk into the store for a replacement?

also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error

vladvertigo said:
also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error
Click to expand...
Click to collapse
Bump thread, same issue here, turn on wifi, says error. Very sad

Same issue here, started to show the error just like that. The night before was working fine and the next day could not turn wifi on.
I did a superwipe and installed mike's Revolution HD 3.6.5 but still same issue.
Hope smb will find where is coming from and really hope is not a hardware issue.

bk_25 said:
Same issue here, started to show the error just like that. The night before was working fine and the next day could not turn wifi on.
I did a superwipe and installed mike's Revolution HD 3.6.5 but still same issue.
Hope smb will find where is coming from and really hope is not a hardware issue.
Click to expand...
Click to collapse
I went back to stock and sent back as a damaged phone

Master Loon said:
I went back to stock and sent back as a damaged phone
Click to expand...
Click to collapse
You are lucky you can return it.
I purchased the phone through E-bay, seller in US and I am in europe, no chance for me to return it
Have been experimenting with ROM's and after a superwipe, clear dalvik, installed [ROM]LeeDROiD Sensational V3.1.0 [KERNEL] LeeDrOiD V3.3.0 | 19th Sept | FAST | STABLE , as i read somewhere on the forum that has ROM close to stock and have been cases it fixed the issue (http://forum.xda-developers.com/showpost.php?p=16125179&postcount=3)
but did not help me, the wi-fi still doesnt turn on at all.
Will update if i find anything or get any results.

Same issue.
thread : http://forum.xda-developers.com/showthread.php?t=1302347
That's four threads with the same issue.
someone in the know must see these threads.
HELP.

vladvertigo said:
also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error
Click to expand...
Click to collapse
I have a fix for my problem. i had another Sensation for repair here for some other hardware issue, so i was playing around with two phones. after all this i figured out the problem.
this flex inside was giving wifi error
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later on did small research, it has a BCM4329EKUBG chip on it which responds for wifi, bt and fm, its not cheap solution to replace a flex, but for somebody this could be only way
Reheating this chip with hot-air fan (it was like 290-300 degrees) helped me, if you want to try this dont blame me if you mess it up !!

vladvertigo said:
I have a fix for my problem. i had another Sensation for repair here for some other hardware issue, so i was playing around with two phones. after all this i figured out the problem.
this flex inside was giving wifi error
later on did small research, it has a BCM4329EKUBG chip on it which responds for wifi, bt and fm, its not cheap solution to replace a flex, but for somebody this could be only way
Reheating this chip with hot-air fan (it was like 290-300 degrees) helped me, if you want to try this dont blame me if you mess it up !!
Click to expand...
Click to collapse
Makes sense, i did once cook a graphics card in an oven on 220 degrees for 20 mins and it brought it back from the dead, still working today, got a video of it somewhere.
So specifically, what did you do please? I'm in a place where i have lots of spare parts lying around from pretty much every phone you can think of, so what do i need please?
Many thanks for having the balls to even contemplate trying this.

dladz said:
Makes sense, i did once cook a graphics card in an oven on 220 degrees for 20 mins and it brought it back from the dead, still working today, got a video of it somewhere.
So specifically, what did you do please? I'm in a place where i have lots of spare parts lying around from pretty much every phone you can think of, so what do i need please?
Many thanks for having the balls to even contemplate trying this.
Click to expand...
Click to collapse
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk

vladvertigo said:
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk
Click to expand...
Click to collapse
Thanks for taking the time to reply and lol @ the paint writing, cheers m8, your a legend, will give it a whirl if all else fails, why not

vladvertigo said:
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk
Click to expand...
Click to collapse
Alright! Now where is my soldering heating gun, I will have to try this one. Reverting to stock everything first in case I mess things up

Any luck??
Did you get it to work this way???
I have the same problem. I try installing ICS on the phone thinking it was a software error. I still have no wifi connection. Try *#*#4636#*#* and the status on the Wifi is Unknown (unintialized on Supplicant state)
Did any of you know where can I get this board (where the BCM4329EKUBG chip is located)?

Sent it back for RMA, changed both lcd screen (a single piece of dust) and rigid flex. Comes by air mail tonight!
Sent from my Sony Xperia Arc S LT18i,
using XDA Premium on Arconium 3c, Android 4.0.4.

Thnx a lot I fixed by heating and I send my 1st post from this device I just repaired by this solution after long search thnx alot
Sent from my HTC Sensation Z710e using xda premium

THANK YOU SO MUCH vladvertigo (caps intended). I tried all the software fixes I could find, even went back to bone stock, S-ON and everything, so this was my last resort before buying a new flex ribbon assembly. I don't have a warranty because I bought the phone on Craigslist.
Anyway, I can confirm that using the heat gun for a minute worked. I made a heat shield out of an aluminum can, with a small square cut in it. Held it right above the bare chip, and the gun right above that. I disconnected the main camera, but not the FFC. Pretty sure I borked it in the process but it's no matter; I'd rather have working WiFi than the FFC. Which I do now, thanks to you! Woo!

Wireless antenna

Hi guys, my super star dhd, wifi antenna broken, it's dropped and wireless not opening... Says error or on - off but not connection.
Where is the wireless antenna? Where can I buy?
sorry my bad eng.
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this part is the wireless antenna

No problem here What do you think ?

wifi hotspot the same error

estremodesign said:
Click to expand...
Click to collapse
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.

Dlog said:
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.
Click to expand...
Click to collapse
i am try new rom and new radio flashed. maybe mainbord problem

coolpixs4 said:
this part is the wireless antenna
Ok thx
Click to expand...
Click to collapse

You should try this rom
ROM: Trickdroid V4.0.0 by torxx
KERNEL: [email protected]
RADIO: 12.39a.60.19U_26.06.06.30_M
I'm using this actually and everything looks fine:fingers-crossed:
even my problem of battery drain was solved, when you flash the rom make the obligatory wipes, then clean the 2 pins of the battery cover, the cooper, this may help and make sure the screws was ok
hope you can fix it:good::fingers-crossed:

I have tha same problem my friends and i tried everything 3 roms (with full wipe) and nothing happends. Also when i activate the bluetooth it seems active but not operate. Any help please.....???

i have same problem with wifi .. if i connect a wire with the terminal i get full signals and if i remove wire i get weak signals.. is my battery cover which is also a wifi antenna has crashed or something should i change the cover ?

hijack :P said:
i have same problem with wifi .. if i connect a wire with the terminal i get full signals and if i remove wire i get weak signals.. is my battery cover which is also a wifi antenna has crashed or something should i change the cover ?
Click to expand...
Click to collapse
Or you can put something on the battery door conections to make them work again. As its just like some conducting paint or something. Or bend the tabs on the phone side a little bit up (BE CARFEULL tho, bend to far and the tab breaks.)
bkoron said:
I have tha same problem my friends and i tried everything 3 roms (with full wipe) and nothing happends. Also when i activate the bluetooth it seems active but not operate. Any help please.....???
Click to expand...
Click to collapse
Answer is posted somewhere i cant remember where tho.
So you'll have to search yourself. (you might want to try wifi error or something).
Goodluck.

HanZie82 said:
Or you can put something on the battery door conections to make them work again. As its just like some conducting paint or something. Or bend the tabs on the phone side a little bit up (BE CARFEULL tho, bend to far and the tab breaks.)
Answer is posted somewhere i cant remember where tho.
So you'll have to search yourself. (you might want to try wifi error or something).
Goodluck.
Click to expand...
Click to collapse
thanks

Looking for Door Panel
Dlog said:
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.
Click to expand...
Click to collapse
I have been using my DHD with two batteries for some time now. The frequient pulling out of the battery has taken its toll on the door panel. It is hardly held in place. Along with it, I have started to face issues with Wi-Fi. I am able to connect only when very close to the Wi-Fi router.
Where can I get a replacement door panel. The service centres have been of little help.
MMTIA.

I suggest to take your phone to a technical place. It's not a software problem

[R&D] Turbo JTAG / EMMC / Direct Hardware Access

Update:
Dev edition of the Turbo has the two pads by the volume buttons uncovered! These MUST be jtag. They ARE POPULATED AND CONNECTED TO THE CPU AND QUALCOMM CHIP!! Top pad to CPU, bottom pad to Qualcomm chipWe NEED someone to please run a JTAG pinout finder tool, or do it manually as I do not have a functional board.
Possible SD-Card by power button. Appears populated and is still connected to cpu (Its actually the power button found on the dev edition of the device, but due to to many pins it may also incorporate sdcard pins?)
Direct access to EMMC not possible due to direct connection to cpu via trace inside the board. (no exposed traces)
(Direct access still possible by installing insert between EMMC and board with necessary traces exposed on insert, with switches to disable connection to board if needed)
Lets identify all relevant chips and pinout plus possible jtag locations! I already did the dirty work and stripped down the Turbo nekkid.
There are two sets of unused connections on the right in this picture. The two sets of pads next to the volume down button are VERY interesting. The top one has 1 ground, and like 13 of the remaining pins go DIRECTLY to the cpu... What feature are we missing? The bottom one goes to the Qualcomm chip with about 6 pins going directly to the chip! (Top layer to the SOC processor has already been removed):
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(Actually looks like cpu die type of chip) This is covered in black epoxy. I've removed the top layer. The eight pads on the left actually had SMD's on them so ignore that, but the eight on the right were blank.. Not sure what they are for. Probably nothing but unpopulated SMD's (will check if exposed pads connect to our mystery chip. :
Qualcomm MDM9625M LTE Modem (Same as Nexus 6)
Top left (partly cut off in the picture)
RF Micro Devices RF7389EU F14NRC2 Envelope Tracking IC (Power Amplifier Module) (GPS) (Same as Nexus 6)
https://chipworks.secure.force.com/catalog/ProductDetails?sku=RFA-RF7389EU&viewState=DetailView&cartID=&g=
Bottom left chip
Texas Instruments TMS320C55 Digital Signal Processor
Here is our storage chip (This is the 32gb version)
SanDisk SDIN9DW4-32G 32 GB eMMC NAND Flash (Same as Nexus 6):
Here is a link to my whole album with a few more photos
Turbo Tear Down

Reserve

Reserve#3

Reserve#4

Not to rain on your parade, but am 96% positive that even if you find the correct location for jtag, it won't work because it has been permenently disabled by blown fuses. 'Cuz that's just how Motorola rolls...

r3pwn said:
Not to rain on your parade, but am 96% positive that even if you find the correct location for jtag, it won't work because it has been permenently disabled by blown fuses. 'Cuz that's just how Motorola rolls...
Click to expand...
Click to collapse
What about direct access to the storage/flash chip?

SaschaElble said:
What about direct access to the storage/flash chip?
Click to expand...
Click to collapse
I dunno, I'm not a hardware guy. :/

It's rather common in recent years for OEMs to not even tie the JTAG pins to pads or traces at all. Most useful JTAG taps like ARM-RPM/ARM7 are locked down, along with the DAP. They've also got a tricky JRC to get past, with zero documentation or BSDL. You're best bet is eMMC. You'd need to find a schematic, or remove your chip and use a multimeter/scope to figure out what is what. eMMC access is moderately realistic given you have a box that can handle 1.8v/3.3v Vcc and Vccq. You'll also need to connect DAT0, CMD, CLK, and GND.

Found some info on the 16gb version used in an LG phone
Now i need to overlay the scematics to my board and see if we can tap into it with minimal modifications.. please chime in with info/experiance?
SDIN9DW4-16G-974 16GBYTE 2.7V T0 3.6V
1 1 .5x1 3.0x1 .0 TR 1 53P MLC NAND FBGA 1 6GB eMMC v5.0 (1ynm 64Gb MLC x 2, 11.5x13.0x1.0)

Ive removed the emmc and see clear traces to componants surrounding the chip. Can make it easier to connect to the chip without removing it. Will post traces via pic soon.

Even if we can modify the EMMC contents, will that help us unlock the bootloader? If I remember correctly (and I could be wrong), the initial stage bootloader is burned into the processor and it hashes/verifies all subsequent bootloaders on moto phones (I haven't seen anything turbo specific). What we really need to do is burn q-fuses.
I really don't want to rain on your parade, I'm just wondering what the end goal is. I also have a fair amount of hobbyist level hardware experience that I can donate if needed.

What I would really like to see is if there may have originally been plans to add a micro SD card slot. Any signs of unused traces that could have been used for a card slot? Or a possible hack that could add one?
Sent from my XT1254 using Tapatalk

PittAussie said:
What I would really like to see is if there may have originally been plans to add a micro SD card slot. Any signs of unused traces that could have been used for a card slot? Or a possible hack that could add one?
Sent from my XT1254 using Tapatalk
Click to expand...
Click to collapse
Well if you look by the power button there is an unused set of pads with extra large pads and each side used for structural support for a connector of sorts...

Yep that almost certainly looks like pads for a micro SD slot. It also looks like the other components are there too, though it is a bit hard to tell in that pic. So long as support for it is still in the firmware it should be possible to do a hack.
Sent from my XT1254 using Tapatalk

daweim0 said:
Even if we can modify the EMMC contents, will that help us unlock the bootloader? If I remember correctly (and I could be wrong), the initial stage bootloader is burned into the processor and it hashes/verifies all subsequent bootloaders on moto phones (I haven't seen anything turbo specific). What we really need to do is burn q-fuses.
I really don't want to rain on your parade, I'm just wondering what the end goal is. I also have a fair amount of hobbyist level hardware experience that I can donate if needed.
Click to expand...
Click to collapse
No, but this gives us the ability for 5.1 users to root their phone. Maybe even downgrade... Or maybe trick wp.
Or how about to give brave developers a way to mess with protected portions of their phone and unbrick if QH_loader doesnt show.
A custom ramdisk would enable true system root.

PittAussie said:
Yep that almost certainly looks like pads for a micro SD slot. It also looks like the other components are there too, though it is a bit hard to tell in that pic. So long as support for it is still in the firmware it should be possible to do a hack.
Sent from my XT1254 using Tapatalk
Click to expand...
Click to collapse
So tracing the emmc I found data0 goes directly to the CPU so no way to tap into that,
BUT
Good news that pad next to the power button directly traces to the CPU so it is VERY likely it the sdcard slot!
Can someone find us a pinout of the snapdragon 805 processor? APQ8084
ALSO: The two sets of pads next to the volume down button are VERY interesting. The top one has 1 ground, and like 13 of the remaining pins go DIRECTLY to the cpu... What feature are we missing? The bottom one goes to the Qualcomm chip with about 6 pins going directly to the chip!

So what if we install our own sdcard and attempt at booting from it when the phone is in a bricked state? Will it default to the external SD Card as a backup bootloader? If so we can dd the bootloader onto the sdcard. And that works we can see if the external backup boot is protected by modifying it...

SaschaElble said:
So tracing the emmc I found data0 goes directly to the CPU so no way to tap into that,
BUT
Good news that pad next to the power button directly traces to the CPU so it is VERY likely it the sdcard slot!
Can someone find us a pinout of the snapdragon 805 processor? APQ8084
ALSO: The two sets of pads next to the volume down button are VERY interesting. The top one has 1 ground, and like 13 of the remaining pins go DIRECTLY to the cpu... What feature are we missing? The bottom one goes to the Qualcomm chip with about 6 pins going directly to the chip!
Click to expand...
Click to collapse
Qualcomm's schematics are extremely proprietary and controlled. You will need to have a licensing agreement or NDA with them in order to even discuss the possibility.
SaschaElble said:
So what if we install our own sdcard and attempt at booting from it when the phone is in a bricked state? Will it default to the external SD Card as a backup bootloader? If so we can dd the bootloader onto the sdcard. And that works we can see if the external backup boot is protected by modifying it...
Click to expand...
Click to collapse
Typically, in my experience, I've seen Qualcomm have a resistor for booting into QHSUSB_BULK/USB boot mode. This process follows the SDC1/SDC3 convention, meaning that it attempts to boot from eMMC first, and if it fails it will boot from external MicroSD. This is entirely dependent on the hardware QFPROM (eFuse) configuration.

So the white "smd" in picture two is actually a processor of sorts... It actually looks like a cpu die when broken apart. It appears to have either 4 or 6 pins... Really wonder what it is. Maybe its a UV wipe-able CMOS kind of chip? And thats why its covered in that black epoxy?

SaschaElble said:
So the white "smd" in picture two is actually a processor of sorts... It actually looks like a cpu die when broken apart. It appears to have either 4 or 6 pins... Really wonder what it is. Maybe its a UV wipe-able CMOS kind of chip? And thats why its covered in that black epoxy?
Click to expand...
Click to collapse
Where to the lines for the pins go?
If it is a writable chip, I would take a guess that some of the wires go to those pads above for programming.
---------- Post added at 11:37 AM ---------- Previous post was at 10:50 AM ----------
SaschaElble said:
So what if we install our own sdcard and attempt at booting from it when the phone is in a bricked state? Will it default to the external SD Card as a backup bootloader? If so we can dd the bootloader onto the sdcard. And that works we can see if the external backup boot is protected by modifying it...
Click to expand...
Click to collapse
Well, bad news. It's not for a Micro SD card. It is actually a connector for the power button on the prototype that used to be where the Motorola logo is. See below:
http://www.droidforums.net/threads/motorola-droid-turbo-prototype-xt1254.280312/
Why they need that many pins for a power button though is beyond me. Maybe it was also a directional button, not just a power button.
Also those two pads near the volume down button were for 2 more connectors, but their use is unknown.

[DISC] Changing motherboards between different models

Hey everyone,
recently my SC-02h (Jap Docomo version) hard-bricked and has no way to recover besides JTAG or motherboard replacement.
This made me think of an experiment.
Can you replace any motherboard (which includes all chips and the storage) with another.
I ordered the g935FD dual sim version with the Exynos chip, this compared to my QC single sim version which is currently bricked.
Hopefully within the next few days I'll receive the motherboard and start the replacement process (I will probable film it) to see if it works.
If so, anyone could replace their motherboard by a new one that is unlocked or has a different chipset.
Please discuss here if you're also interested in changing your own mobo with another.

Can't see why it won't work as the motherboard is what determines the model. Just make sure you order up a dual SIM tray too.

Motherboards from different chipsets *may* have different connections on how things wire up. I'm not saying they do, I'm just thinking out loud. I'd only buy a replacement motherboard from the same variant.
And good luck finding a new motherboard. At the price they sell for, you'd be better off buying a whole new phone.

Would like to see how this goes. Please record the process.
Sent from my SM-G935T using Tapatalk

lyriquidperfection said:
Can't see why it won't work as the motherboard is what determines the model. Just make sure you order up a dual SIM tray too.
Click to expand...
Click to collapse
Yea I ordered that one, although I thought the tray looks the same (bottom part), so until my new one arrives I'll use the older one.
the_scotsman said:
Motherboards from different chipsets *may* have different connections on how things wire up. I'm not saying they do, I'm just thinking out loud. I'd only buy a replacement motherboard from the same variant.
And good luck finding a new motherboard. At the price they sell for, you'd be better off buying a whole new phone.
Click to expand...
Click to collapse
I checked the connections and they are the same, the only thing that differs is the sim holder and the chipset.
Also a new phone (unlocked) costs at least 2,5times more (live in Japan).
dogredwing1 said:
Would like to see how this goes. Please record the process.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
I'll record it on video as soon as it arrives, also the process of taking it out and replacing it completely. So if it ends up in failure you can all see it.

In what way is it bricked? The S7 is almost impossible to brick.

CuBz90 said:
In what way is it bricked? The S7 is almost impossible to brick.
Click to expand...
Click to collapse
Hmm I flashed a rom with TWRP, (lineage, but wrong build) after that I rebooted and the phone stopped responding completely.
So black screen, no led when charging, no response at all when pressing buttons.
Even disconnecting battery and reconnecting didn't work.
Also no recognition in windows when connected to USB

totalvamp said:
Hmm I flashed a rom with TWRP, (lineage, but wrong build) after that I rebooted and the phone stopped responding completely.
So black screen, no led when charging, no response at all when pressing buttons.
Even disconnecting battery and reconnecting didn't work.
Click to expand...
Click to collapse
Can't get to download mode?

CuBz90 said:
Can't get to download mode?
Click to expand...
Click to collapse
Well if I could I wouldn't be ordering a new MoBo
Even made a USB JIG

Another thing you might lose is waterproofness. I cracked my screen badly and instead of repairing it at a 3rd party shop, I sold it and got a new one. Coz it won't be waterproof anymore..

thedisturbedone said:
Another thing you might lose is waterproofness. I cracked my screen badly and instead of repairing it at a 3rd party shop, I sold it and got a new one. Coz it won't be waterproof anymore..
Click to expand...
Click to collapse
i should be fine, just get it glued back together properly.
besides i don't really care about it.

Unless the other components (camera, vibrator motor, various sensors, OLED Panel etc.) don't differ in the way they talk to the mainboard, I don't see why it shouldn't work. As others have said, I'd really love to see how it'll work out for you. So, thanks for sharing =)

Well it didn't work out, I put in the new motherboard but the phone didn't power on at all. There is also no led when trying to charge it. I'll be sending it back to the supplier and buy another version instead.

https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure

totalvamp said:
https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure
Click to expand...
Click to collapse
Was interesting to watch, however you only tried powering on twice and quit?
Connecting a charger had no effect?
Unless the board your received was dead to begin with.

totalvamp said:
https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure
Click to expand...
Click to collapse
Can you share the link of where you bought the motherboard? It might be that you bought a blank motherboard. In that case you want it to be flashed with the correct IMEI and partition (table?). AFAIK the IMEI has to be that of your previous phone since you can't just "create" a new IMEI. Don't even want to get into the legal repercussions but here's a sneak peak; in some countries it's a criminal offence to alter an IMEI or even have tools to alter IMEI. Don't quote me on this and I'm asking the community to correct me. If the motherboard comes from a previously active device, it should have its own IMEI and none of what I said before matters.
Whatever, none of that necessarily explain why it didn't boot up. Have you tried charging and plugging it to a PC? If it isn't dead, your PC should at least detect A device.

murtaza02 said:
Was interesting to watch, however you only tried powering on twice and quit?
Connecting a charger had no effect?
Unless the board your received was dead to begin with.
Click to expand...
Click to collapse
Well I tried a few times after that and after letting it on a charger, still no response.
nitrous² said:
Can you share the link of where you bought the motherboard? It might be that you bought a blank motherboard. In that case you want it to be flashed with the correct IMEI and partition (table?). AFAIK the IMEI has to be that of your previous phone since you can't just "create" a new IMEI. Don't even want to get into the legal repercussions but here's a sneak peak; in some countries it's a criminal offence to alter an IMEI or even have tools to alter IMEI. Don't quote me on this and I'm asking the community to correct me. If the motherboard comes from a previously active device, it should have its own IMEI and none of what I said before matters.
Whatever, none of that necessarily explain why it didn't boot up. Have you tried charging and plugging it to a PC? If it isn't dead, your PC should at least detect A device.
Click to expand...
Click to collapse
http://www.ebay.com/itm/MAIN-MOTHER.../182310990269?ssPageName=ADME:X:RRNTB:NL:3160
It should be one with an IMEI how else can it be unlocked.
I tried plugging it in as well, but my PC doesn't recognise it at all.
I've ordered a different one this time, this motherboard was also slightly different from the one I had (2 cables instead of 3) so it might be incompatible.
I ordered this one now: https://www.aliexpress.com/snapshot/0.html?orderId=82116420384467&productId=32737224430

Did you end up having any luck with the second motherboard?
Or has anyone else attempted this before?
I'm looking to swap my qc chip for the exynos.

How was the operation??
Hello i'm interested to know how was the experiment becouse i wanna try almost the same thing, i have a s7 sm935fd and i wanna change the motherboard for a sm935f model. Please answer me!

I am also going to try swapping motherboards. How did yours work out?
Hi @totalvamp,
I am going to try swapping out a good motherboard from a banged up sprint G930P phone with a clean IMEI into a clean, whole, G930X demo model that I picked up cheap on Ebay.
The "X" demo phones work on WIFI only. I understand that the "X" motherboards are missing the cellular radios, which is why I am trying this swap -- it should be far easier and less costly than doing a full screen&LCD replacement, which requires tearing down the entire phone, and costs about $150. Hopefullly, I will just have to remove the back, the QI receiver and I think the camera, and I'll get access to the motherboard.
My hope is that all the rest of the parts are present -- we'll see how it goes.
I look forward to hearing from you.
Philip

Wifi disconnecting when battery not on charge

Hi all. As written my sm-t905 has this strange wifi problem. Tried on different networks and same results
Tried a lot of different custom and official roms and same results
Worked on every wifi settings and same results
Wifi is stable only when tablet is on charge
Some suggestions?
Thx :good:

I had almost the same problem, not like you though but on lower than 60% battery it had this problem of disconnecting then not going to turn on! check the battery connection and everything, all were good.
the wifi chipset is problematic in many of Samsung devices, try dialing *#0011# to go to service menu then wlan and then disable saving battery mode, (it will deplete your battery way faster than before, be sure to turnoff wifi when not using it!) mine had problem before that, now only being on airplane mode and then wifi on works otherwise wifi chipset stuck on turning on... forever. check other threads , many people have the same pronblem with no workaround. replacing mobo works.
did install many Roms, all the same, so stuck to stock Touchwiz lollipop that still there is a workaround for having a working wifi.
never going to buy Samsung ever again.

skylive3d said:
I had almost the same problem, not like you though but on lower than 60% battery it had this problem of disconnecting then not going to turn on! check the battery connection and everything, all were good.
the wifi chipset is problematic in many of Samsung devices, try dialing *#0011# to go to service menu then wlan and then disable saving battery mode, (it will deplete your battery way faster than before, be sure to turnoff wifi when not using it!) mine had problem before that, now only being on airplane mode and then wifi on works otherwise wifi chipset stuck on turning on... forever. check other threads , many people have the same pronblem with no workaround. replacing mobo works.
did install many Roms, all the same, so stuck to stock Touchwiz lollipop that still there is a workaround for having a working wifi.
never going to buy Samsung ever again.
Click to expand...
Click to collapse
I checked and the same for me...it starts to disconnect under 60% battery level
Unluckly with *#0011# code it doesn't go on the wifi menu. It does nothing! Not even with *#06# is possibe to look at the imei number(but imei is normally written in the info menu). It seems it doesn't get codes at all from dialer
What could I do to enter in the hiden wifi menu?
Now I'll try to open it to check the battery connection but I find it really strange that a lot of people as the same wifi problems
Thanks in advance

This is a common flaw in Samsung tablets , not only this model but others as well. It's very easy to fix but most users don't realize the problem due to lacking of technical understanding or equipment: microscope and solder iron to resolder battery connector.
1- The first fix is easy, most average users can do it: fixing the loose battery cables. This model has intermittent power, battery capacity fluctuation.....etc.. due to loose battery cable
https://forums.androidcentral.com/s...350-goes-continual-boot-loop.html#post5928150
2- The second one requires soldering skill which most don't know how. However, you can get it done from the help of a repair shop or anyone knows how to solder
Most Samsung tablets, especially the 10.1 or 12.2, have the cracked solder joints of battery connector due to loose mainboard which has only few screws to secure it.
The Note Pro has only 3 screws at two speakers to hold the mainboard which sits on top of a flexible LCD.
If you take my advice seriously and fixing these two battery connectors, you'll solve any problem related to power.
This flaw is very obvious but I see a lot of people ignore it and try to do something else and keep complaining about the problem of Samsung tablets.
After take care of these connectors, your tablet may last another 2 years until the mainboard goes bad.

Beut said:
This is a common flaw in Samsung tablets , not only this model but others as well. It's very easy to fix but most users don't realize the problem due to lacking of technical understanding or equipment: microscope and solder iron to resolder battery connector.
1- The first fix is easy, most average users can do it: fixing the loose battery cables. This model has intermittent power, battery capacity fluctuation.....etc.. due to loose battery cable
https://forums.androidcentral.com/s...350-goes-continual-boot-loop.html#post5928150
2- The second one requires soldering skill which most don't know how. However, you can get it done from the help of a repair shop or anyone knows how to solder
Most Samsung tablets, especially the 10.1 or 12.2, have the cracked solder joints of battery connector due to loose mainboard which has only few screws to secure it.
The Note Pro has only 3 screws at two speakers to hold the mainboard which sits on top of a flexible LCD.
If you take my advice seriously and fixing these two battery connectors, you'll solve any problem related to power.
This flaw is very obvious but I see a lot of people ignore it and try to do something else and keep complaining about the problem of Samsung tablets.
After take care of these connectors, your tablet may last another 2 years until the mainboard goes bad.
Click to expand...
Click to collapse
Finally the solution! That's amazing! Thank's a lot! :fingers-crossed:
P.s: I opened the back cover and battery connector seems to be ok but I can't be sure about it. In the next days I will take it to a repairing lab to ask how much can it cost to re-soldering the connector. I wish it will be cheap cause i coudn't do it by myself. My solderer has not enough small spot and I wouldn't buy a new one just for this fix... Beut,do you know how much could it be a reasonable price for such workaround? Thanks

freccia said:
Finally the solution! That's amazing! Thank's a lot! :fingers-crossed:
P.s: I opened the back cover and battery connector seems to be ok but I can't be sure about it. In the next days I will take it to a repairing lab to ask how much can it cost to re-soldering the connector. I wish it will be cheap cause i coudn't do it by myself. My solderer has not enough small spot and I wouldn't buy a new one just for this fix... Beut,do you know how much could it be a reasonable price for such workaround? Thanks
Click to expand...
Click to collapse
This is a phenomenal problem of Samsung tablets especially this Note Pro or Tab Pro. Battery connector is not supposed to be a moving part, that's why minimum solder is needed.
However, look at the mainboard you'll see it's weakly secured to the frame sit on top of the flexible LCD. In order to see the cracks under neath of the connector, you'll need a power microscope.
This a fix from a Samsung Repair Center who is contractor, authorized to fix Samsung tablets
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Both connectors are fixed but they soldered the cables directly to connector on mainboard. Without knowing this, an innocent users will break both connectors when trying to replace the battery.
Trust me, over hundreds of Note Pro or Tab Pro I bought, only a few can pass my test. I actually push the connector by screw driver to see if it's not moving.
Here was a lot of 7 Note Pro I bought, all had the same problem that connectors need to be fixed
I don't know how much they charge in your area but this work takes only 5 minutes with a professional.

Beut said:
This is a phenomenal problem of Samsung tablets especially this Note Pro or Tab Pro. Battery connector is not supposed to be a moving part, that's why minimum solder is needed.
However, look at the mainboard you'll see it's weakly secured to the frame sit on top of the flexible LCD. In order to see the cracks under neath of the connector, you'll need a power microscope.
This a fix from a Samsung Repair Center who is contractor, authorized to fix Samsung tablets
Both connectors are fixed but they soldered the cables directly to connector on mainboard. Without knowing this, an innocent users will break both connectors when trying to replace the battery.
Trust me, over hundreds of Note Pro or Tab Pro I bought, only a few can pass my test. I actually push the connector by screw driver to see if it's not moving.
Here was a lot of 7 Note Pro I bought, all had the same problem that connectors need to be fixed
I don't know how much they charge in your area but this work takes only 5 minutes with a professional.
Click to expand...
Click to collapse
You really made my day. As first cause i laugh looking how the samsung lab worked on that poor connector. At last cause I really understand the problem and how to workaround on it! It's unbelievable that a 1000$ device didn't receive enough care about a simple connection soldering by the factory... you deserve success in your refurbishment of note pro lot. :good:
Have good time! Bye

This is an example of a badly cracked battery connector.
I will explain your power problem just based on Ohm law of parallel circuit. Battery of P900 or P905 has two cells connected in parallel : two red ( positive) and black ( negative ) cables.
V (total) = V1 = V2
However,
I ( total ) = I1 + I2
P( total )= P1+ P2
If one pin or one cable of positive is suddenly open, you lost half of battery power. That's why you can see battery drops quickly in few minutes, then moment later
or after a reboot, it go back to previous percentage. If two positive or negative are open, you have no power.

The question is why then it only affect wifi chipset? no slow charging or fast discharging battery problem, no flickering , no sudden turnoff!
everything fine except BT and Wifi, cause they are on the same chip. after turning off the save battery mode on wifi, it works even on 20%
I checked the connection several times, all were fine.
If only the OP re-soldering worked then I will accept your view on the cause of the problem.

I never run custom ROM so I don't know if this's problem from its firmware. All Note Pros were in my possession, running stock ROM, have never had Wifi dropping while at low charge or not connected to a charger.
My first action to any of this tablet is fixing these two connectors regardless their condition, because sooner or later, they will fail: one or both.
Bluetooth and Wifi are not related as they have separated components and circuit.

Beut said:
This is an example of a badly cracked battery connector.
I will explain your power problem just based on Ohm law of parallel circuit. Battery of P900 or P905 has two cells connected in parallel : two red ( positive) and black ( negative ) cables.
V (total) = V1 = V2
However,
I ( total ) = I1 + I2
P( total )= P1+ P2
If one pin or one cable of positive is suddenly open, you lost half of battery power. That's why you can see battery drops quickly in few minutes, then moment later
or after a reboot, it go back to previous percentage. If two positive or negative are open, you have no power.
Click to expand...
Click to collapse
you focus the question. it's exactly as you write. Luckly in my case it was only a bad contact cause after cleaning connector and pins with alchol it started to work normally. Now I really enjoy it and i'm thanksfull to you cause you pointed me on the right way!:good:
Beut said:
I never run custom ROM so I don't know if this's problem from its firmware. All Note Pros were in my possession, running stock ROM, have never had Wifi dropping while at low charge or not connected to a charger.
My first action to any of this tablet is fixing these two connectors regardless their condition, because sooner or later, they will fail: one or both.
Bluetooth and Wifi are not related as they have separated components and circuit.
Click to expand...
Click to collapse
Not depending from rom. As you said it's connector-electric problem. It made this on each rom I runned
cheers mate!

skylive3d said:
The question is why then it only affect wifi chipset? no slow charging or fast discharging battery problem, no flickering , no sudden turnoff!
everything fine except BT and Wifi, cause they are on the same chip. after turning off the save battery mode on wifi, it works even on 20%
I checked the connection several times, all were fine.
If only the OP re-soldering worked then I will accept your view on the cause of the problem.
Click to expand...
Click to collapse
you have to belive him. I read some case of people with flickering and rebooting problem cause bad power connector soldering. :fingers-crossed:
In each case problem was solved with resoldering(in the worst cases) or cleaning(in best cases) connector and pins. You can't know exactly what a lower power (cause missing part of parallel connection) could affect in different devices
cheers

freccia said:
you focus the question. it's exactly as you write. Luckly in my case it was only a bad contact cause after cleaning connector and pins with alchol it started to work normally. Now I really enjoy it and i'm thanksfull to you cause you pointed me on the right way!:good:
cheers mate!
Click to expand...
Click to collapse
Thanks for posting the result. If anyone is nice like you, others will benefit from the learning experiences of DIY.

Beut said:
Thanks for posting the result. If anyone is nice like you, others will benefit from the learning experiences of DIY.
Click to expand...
Click to collapse
I like to help community as much as community helps me :highfive:

freccia said:
you have to belive him. I read some case of people with flickering and rebooting problem cause bad power connector soldering. :fingers-crossed:
In each case problem was solved with resoldering(in the worst cases) or cleaning(in best cases) connector and pins. You can't know exactly what a lower power (cause missing part of parallel connection) could affect in different devices
cheers
Click to expand...
Click to collapse
Yea, OK, I guess he might be right , so you just cleaned the connector and Bam wifi works fine and no drops on low battery! hmm, interesting!

skylive3d said:
Yea, OK, I guess he might be right , so you just cleaned the connector and Bam wifi works fine and no drops on low battery! hmm, interesting!
Click to expand...
Click to collapse
It's strange but yes... After a deep clean with alchol to connector and pins I no more had drops on low battery. I think it was on ossidation status and had a bad contact. Now I can really enjoy this wonderful tablet :good::fingers-crossed: