Replace NAND chip - Android Stick & Console Computers General

HELLO,
i would like to try to replace the nand chip of my bricked tv box with a new chip
this because the original chip has been damaged shortening two pins trying to put the device in mask rom mode
my device is t-r42 based on rk3188
the price of the nand flash is about $4,
i can found it on some chinese online store
i hope that replacing the nand, my device will go to mask rom mode, enabling me to do the firmware loading through pc (rkbatchtool)
i know that this mode has been designed specifically to load the firmware the first time,
so i hope my device will go to this mode the first time i power on it after replacing it
any suggestion?
any hint?
i know this must be done with :microscopic` attention
thanks!!

Vicolodo said:
HELLO,
i would like to try to replace the nand chip of my bricked tv box with a new chip
this because the original chip has been damaged shortening two pins trying to put the device in mask rom mode
my device is t-r42 based on rk3188
the price of the nand flash is about $4,
i can found it on some chinese online store
i hope that replacing the nand, my device will go to mask rom mode, enabling me to do the firmware loading through pc (rkbatchtool)
i know that this mode has been designed specifically to load the firmware the first time,
so i hope my device will go to this mode the first time i power on it after replacing it
any suggestion?
any hint?
i know this must be done with :microscopic` attention
thanks!!
Click to expand...
Click to collapse
your going to have to find someone with a hot air rework station to unmount and or remount a new chip. the thing of it is, the pcb has to have perfect traces,,, 0 damage. even if that is met, unmounting and remounting a new chip in a perfect world takes a lot of skill and experience. will it get you into mask rom mode,,, I would guess yes. far as I understand it, thats a hardware thing not a os thing (os=firmware). Unless its something you just want to tinker with just to see if you can do it I wouldnt bother. Thats just me. I have crashed units over and over and got into mask rom mode doing the pin short, purposely trying different firmwares to see if they would work. I am not sure if mask rom mode will happen with out the pin short on a blank chip. maybe thats another question.
if you find someone local that does rework on surface chips, best bet would be ask them. Also a better answer here at least for me would be a close up picture of the chip you speak of, it would probly tell a thousand words. I have done rework, not in the past 5 years but I have. it takes a extremely steady hand and a good feel for when the solder is fluid. Theres tricks to it, do it wrong and theres no fixing the torn traces. Maybe craiglist would point you to someone who does this sort of work in your area. Possibly a local flat screen tv repair center may be able to direct you to someone local also, they are packed with sm chips.
Just some thoughts

stinkster said:
your going to have to find someone with a hot air rework station to unmount and or remount a new chip. the thing of it is, the pcb has to have perfect traces,,, 0 damage. even if that is met, unmounting and remounting a new chip in a perfect world takes a lot of skill and experience. will it get you into mask rom mode,,, I would guess yes. far as I understand it, thats a hardware thing not a os thing (os=firmware). Unless its something you just want to tinker with just to see if you can do it I wouldnt bother. Thats just me. I have crashed units over and over and got into mask rom mode doing the pin short, purposely trying different firmwares to see if they would work. I am not sure if mask rom mode will happen with out the pin short on a blank chip. maybe thats another question.
if you find someone local that does rework on surface chips, best bet would be ask them. Also a better answer here at least for me would be a close up picture of the chip you speak of, it would probly tell a thousand words. I have done rework, not in the past 5 years but I have. it takes a extremely steady hand and a good feel for when the solder is fluid. Theres tricks to it, do it wrong and theres no fixing the torn traces. Maybe craiglist would point you to someone who does this sort of work in your area. Possibly a local flat screen tv repair center may be able to direct you to someone local also, they are packed with sm chips.
Just some thoughts
Click to expand...
Click to collapse
thank you very much,
i will let you know!!

Vicolodo said:
thank you very much,
i will let you know!!
Click to expand...
Click to collapse
A quick alternative for establishing that it is only a faulty NAND is to try booting Linux from an SD card. If that works, then you could look around for someone who has created running Android from SD card for your device and you could at least still use your device in the interim.

Related

Possible to flash radio / rom / anything with broken USB?

After I got my skyrocket, many of my friends and family also decided on the skyrocket Well, now it's up to me to make sure they're all in working order.
So one of my family members left her skyrocket in a bag of water for a while while she was at the beach, and it was completely unresponsive. I fully disassembled it (not my first time), dried out the majority of the water, then left the phone in rice for a few days. The good news is, the phone boots up and seems to work. The battery still works and it charges over USB.
The bad news is, the cellular radio does not work, IMEI comes up as unknown, bluetooth mac is "unavailable", front facing camera is also unresponsive. Really bad news: data/adb over usb does not register at all. A few more days in rice haven't helped.
The phone is completely stock. My first thought was that flashing a new radio might reset the cellular somehow, but not having cwm/odin makes that impossible. I can't seem to get the phone into download mode either because of the USB problem.
One thing that DOES work is the stock recovery. I can tell it to flash the official ATT ICS build, which contains a radio!
However when I try flashing it says.. "E: Short write of /tmp/sideload/package.zip (No space left on device) Installation aborted". Other zips "failed to verify whole-file signature"
Any ideas? My next step will be buying a used skyrocket with a cracked screen, and transplanting the working screen from this unit...
Tom
First off, please use the Q&A section for, you know, questions and answers. Don't create a new thread; I'm going to ask the mods to move this one instead.
Second, your issue is that the hardware radio is dead. The stock ROM only has a software radio included. To put it a different way, the stock ROM includes programming that tells the cell radio what to do. It can't fix the cell radio if it's broken, though. Unfortunately, based on the amount of damage you've got there, I'd say your phone is pretty much toast.
If you're completely stock, try to warranty it out. Just be up front with Sammy about what happened (because, in this instance, they will figure it out if you make up a story or play dumb), and the worst thing they can say is no. You might get a sympathetic rep who'll help you out. If they won't take it, you've already got your backup plan in the working SR.
T.J. Bender said:
First off, please use the Q&A section for, you know, questions and answers. Don't create a new thread; I'm going to ask the mods to move this one instead.
Second, your issue is that the hardware radio is dead. The stock ROM only has a software radio included. To put it a different way, the stock ROM includes programming that tells the cell radio what to do. It can't fix the cell radio if it's broken, though. Unfortunately, based on the amount of damage you've got there, I'd say your phone is pretty much toast.
If you're completely stock, try to warranty it out. Just be up front with Sammy about what happened (because, in this instance, they will figure it out if you make up a story or play dumb), and the worst thing they can say is no. You might get a sympathetic rep who'll help you out. If they won't take it, you've already got your backup plan in the working SR.
Click to expand...
Click to collapse
Meant to post this in Q&A, woops. Too many xda tabs open trying to figure this out. Sorry about that
I do know the difference between the hardware/software radios... My thought was that while the phone was turned on and submerged, the software radio could have become corrupt... A long shot perhaps
I'll try contacting samsung, but somehow I doubt they'll cover it. Sidenote, do you really think they have a more sophisticated way to check for water damage than the internal water-damage indicator sticker?
The question still stands though, if anyone is interested. Even without a cell radio, I'd like to be able to root it for other purposes
Thanks for the advice
Tom
dutchthomas said:
Meant to post this in Q&A, woops. Too many xda tabs open trying to figure this out. Sorry about that
I do know the difference between the hardware/software radios... My thought was that while the phone was turned on and submerged, the software radio could have become corrupt... A long shot perhaps
I'll try contacting samsung, but somehow I doubt they'll cover it. Sidenote, do you really think they have a more sophisticated way to check for water damage than the internal water-damage indicator sticker?
The question still stands though, if anyone is interested. Even without a cell radio, I'd like to be able to root it for other purposes
Thanks for the advice
Tom
Click to expand...
Click to collapse
Yeah, based on the amount of things going wrong, it's hardware. If the software radio was corrupt, it would be because the internal storage had been corrupted, and your phone likely would not boot.
And yes, they can find water damage beyond the sticker. They can see corrosion plain as day when they open it up and look at the internals.
You can root it without USB working. Is your wifi working? If so, download GooManager off the market, then follow the instructions in the TWRP thread to get TWRP on your phone. Download a custom ROM to your PC, then transfer it to your external SD using an adapter/card reader so you can place it on the card directly (instead of going through the USB port). Use TWRP to flash the pre-rooted ROM onto your phone and viola. Unless there's a pre-rooted stock out there (and I don't think there is for SR), a custom ROM is the only way I can think of to do it.
Be advised, though, that because of the amount of damage done to your phone's internals, there's a better-than-normal chance that something won't work and you'll brick. I'm not responsible for your decisions or for the brick if that happens.
Long story short, just get a replacement SR.
Same thing happened to my girls Atrix. She gave it a nice bath in Green Tea. After shutting it down and pulling it apart I gave it the rice treatment for 48 hours. Booted but returned a radio error. Her USB port was working so I was able to root it and install a few custom ROMs on it. No change. So I would bet you actually fried the chip. Call Sammi and get a quote to cover the repair which will be a new mobo. They pay shipping both ways and are usually pretty cheap.
hechoen said:
Same thing happened to my girls Atrix. She gave it a nice bath in Green Tea. After shutting it down and pulling it apart I gave it the rice treatment for 48 hours. Booted but returned a radio error. Her USB port was working so I was able to root it and install a few custom ROMs on it. No change. So I would bet you actually fried the chip. Call Sammi and get a quote to cover the repair which will be a new mobo. They pay shipping both ways and are usually pretty cheap.
Click to expand...
Click to collapse
Heh, this is my mother's phone actually. First she ripped the screen ribbon cable on a nokia E75. Then she smashed her Atrix's screen, tried to fix it herself with a new screen, and managed to rip part of a ribbon cable... so it no longer has a working touch digitizer. Now she left her skyrocket in a bag of water. The girlfriend managed to crack her skyrocket's screen, which I replaced... I've also had to fix 2x nokia N95's, an N97, and a bunch of water damaged dumb phones over the years...
FWIW, the skyrocket seems to have the best repairability / internal layout of any of the phones I've messed with
The cracked screen skyrockets on ebay seem to be going for more than I thought, so I'll be giving sammy a call for sure

[Q&A] WiFi stuck on turning on; MAC 02:00:00:00:00:00; G2 G3 G4 G5 Nexus5 Nexus 7 etc

[Q&A] WiFi stuck on turning on; MAC 02:00:00:00:00:00; G2 G3 G4 G5 Nexus5 Nexus 7 etc
Hi!
If you are reading this now, you are probably one of the unlucky fellows who's WiFi (and Bluetooth) stopped functioning, and if so, you are probably deperately searching for a solution/fix. I might have something for you, but first:
*** DISCLAIMER/WARNING ***
You yourself are exclusively responsible for whatever may (or may not) happen to your mobile device, to yourself or others. I am only giving hints/advices here that *MAY* help, but I will not take any responsability, nor will I provide any support, in absolutely *ANY CASE*, including, but not limited to: your problem not being solved or/and your mobile device becoming partially or completely broken. Let me be very clear: If you do anything to your device rendering it useless, destroying it, seriously or fataly injuring you or others, and then come blaming me or/and cry for help, I will point my index finger at you and laugh at you. Period.
If you are a impatient person and want to get straight to the point, jump right to section 6.
Table of Contents
0. Foreword
1. Description of the problem
2. Urgent advice
3. Things that didn't work
4. There is little hope
5. My most obvious advice
6. LET'S GET SERIOUS!
6.a Sellotape / Scotch tape
6.b Refrigerator / Freezer
6.c Oven
0. Foreword
Two or three months ago, one fine morning, the WiFi/BT of my LG G2 suddenly stopped working. Initially I thought this would be only one stupid annoying minor thingy, that I’d be able to solve it fast. I was wrong.
1. Description of the problem
When turning on the WiFi, it would just stay in "Turning on..." forever. Similar thing for Bluetooth: It would stay on for a few seconds and then turn itself off again after. (But then, who needs Bluetooth anyway, WiFi ist probably 100 times more important...). I have thoroughly searched the internet, and I found quite some videos with exactly the same problem (remove the two blanks from the links to watch):
h ttps://w ww.youtube.com/watch?v=fRGnQz1zUmw
h ttps://w ww.youtube.com/watch?v=4W8YJMDFM88
h ttp://w ww.dailymotion.com/video/x2cuyjt_nexus-5-turning-wifi-on-frozen-problem_tech
2. Urgent advice
I want to prevent you from wasting countless hours searching for a solution - I wasted so much of my time already, no need for you to repeat that. Therefore: *Please* be aware that there is a VERY HIGH PROBABILITY that this issue is being caused by a hardware defect. I can not speak for all devices of course, but keep in mind that the main reason I wasted so much time, was me beliving it was some software issue! See the next section for a glimpse of stuff I have tried without any success:
3. Things that *DIDN'T* work
01. Restarting WiFi/Bluetooth several times
02. Rebooting the phone
03. Turning airplane mode on/off several times
04. Slapping/hitting the phone (this was indeed suggested in a forum)
05. Using WiFi-Fixer apps
06. Resetting to factory settings
07. Upgrading to newest Android version
08. Fully drained the battery and left it uncharged for several hours
(Rooted the phone)
09. Deleting the /data/misc/wifi/wpa_supplicant.conf
10. Deleting the whole /data/misc/wifi folder
11. Creating a file named ".bdaddr" in /persist/bluetooth containing a MAC-Address in hexadecimal format
12. Creating a file named ".macaddr" in /persist/wifi containing a MAC-Address in hexadecimal format
13. Flashing several custom ROMs to it (CyanogenMod, ParanoidAndroid, ...)
14. Going back to stock ROM
15. etc. etc. etc.
16. Several combinations and permutations of the above
4. There is little hope
Again, as the cause of the problem is most likely a hardware issue, I don't recommend going through all the steps as described in the previous section; however, though none of the steps worked for me, this doesn't mean that none won't work for you neither; you might be luckier than I was. In that case, enjoy your restored WiFi and be happy.
5. My most obvious advice
You need to replace the motherboard (main board) of your device.
Honestly, if you can afford it and it doesn't cause too many inconveniences to you, you'll be better off by simply buying a new device. If you don't want to buy a new device, send it in for repairs. If you don't want to do that as well, you'll have to fallback to a DIY solution:
I. Buy a new main board for your device. Be careful to get exactly the right component for your specific model. If you dont find any shop selling those, there are plenty of individuals out there that own devices with broken displays. You dont need the displays, you need the motherboard. Buy one such broken device, and you'll have your main board replacement.
II. Replace your main board or let someone else do it for you
Continues below.
continuation
6. LET'S GET SERIOUS!
If you are reading this, you either didn't read or you decided not to follow my most obvious advice in section 5. So be it. If you want to carry on from here, be sure to re-read my disclaimer at the top of my post.
There are 3 DIY possible fixes for the WiFi problem - none is guaranteed. I will describe them from the most harmless to the most kamikaze/deadliest. All of them will require you to open your device; if you are not careful and damage any of the components inside, you will end up with a worse device than before - but hey, don't say I didn't warn you.
At this point we assume that the cause of the problem is a faulty solder joint of your WiFi IC. The goal is to try to restore that solder joint. To do that, you will have to:
I. Open your device
II. Find your main board and separate it from all connected plugs
III. Find / identify the WiFi IC chip on the main board. I recommend searching for a service manual for your device, or/and searching for a disassembly video for your device; you need to know which one of the chips on the main board is the WiFi one.
Once you have identified your WiFi chip, you have 3 options, which you may combine with each other, but I recommend to try them out one-by-one as follows:
6.a Sellotape / Scotch tape
You need to make sure that your WiFi chip is pressed against the main board (ideally, this ensures the broken contacts touch each other, solving the problem). The best way to achieve this, is to attach a series of tape strips on the top of the WiFi chip, causing it to be pressed against the main board by the surrounding cover/hull once you reassemble/close the device. The tape strips are just a suggestion, do whatever you find convenient as long as you ensure that the chip is pushed against the board at all times.
This method may solve the WiFi problem already. When you turn your device back on, give it some time (5-10 minutes) and reboot it a few times if the problem still persists. My own WiFi didn't function right away, but after a while it finally recovered - hurray!
6.b Refrigerator / Freezer
Instead of using the tape as described in 6.a, you may first try to put your motherboard in a fridge for a few hours/days. But make sure to put it there in a plastic bag, and avoid moisture as much as you can, specially when taking it out of the fridge. Make sure its completely dry before reassembling your device!
By the way, try the refrigerator option BEFORE you try the freezer option!
6.c Oven
If everything else fails, the oven might be your last chance. This is not a joke, but as you probably can assume, it is "All-In" i.e. highly risky. The theory behind this is that high temperature will cause defective solder joints to reflow, reconnecting and thus fixing the problem.
You should only try this as a matter of last ressort. Be warned that you may fully destroy your main board, and there is a high chance that you will. Also, you may cause serious injury to yourself or others. Make sure you make backups of your data first. DO NOT BAKE THE WHOLE DEVICE, ONLY THE MAIN BOARD. DO NOT BAKE THE BATTERY!!
If you are still reading:
I. pre-heat your oven to 385° Fahrenheit (196° Celsius)
II. put your main board in the oven, bake it there for 7 minutes
III. remove from the oven, let it cool down until every component of the board has room temperature
Finally, here is a video of a guy doing a similar thing, but with a heat gun:
h ttps://w ww.youtube.com/watch?v=A4n0j3uaS7E
Ok, this is all, I hope I could help you.
Good luck!
Summary
Hello all,
first of all, I want to thank brysclar and xbing6 for their valuable feedback! Thanks a lot guys! :good:
Now, in an effort to update this thread and in an effort of trying to summarize it in fewer words (my disclaimer above applies!):
- The described problem seems to affect mainly (all kinds of) LG devices
- The issue seems to be caused by a defective soldering of the Wi-Fi chip on the main board
- The defect seems to be induced by dropping or/and overheating the device; recharging the battery, big/long app or android updates or the flashing of custom roms could cause excessive heating
- brysclar pointed out that replacing the battery might solve the problem (I haven't tried this out myself, so I can neither deny nor confirm this)
- My recommended solution is 6.a - applying pressure on the Wi-Fi chip, pushing it against the main board, using tape stripes
- There is a video of a brasilean guy doing some similar, but using pieces of an old credit card instead of tape strips: https://www.youtube.com/watch?v=OJkdva2iOag BUT PLEASE NOTE THAT HE IS APPLYING THE PRESSURE ON A RANDOM SPOT, NOT DIRECTLY TO THE WIFI CHIP! It *may* work for you, but if it doesn't, find/identify your Wi-Fi chip and apply the pressure there
- If everything else fails, and only as a matter of last ressort, you may try what I have written in 6.c
So... this thread has over 500 views, but not one single reply.
Guys... what has your experience been? Have you tried anything out from the posts above, and if so, what was the result? Did it help you? Do you recommend anything? Has something else, not written here, worked for you?
There are a lot of people out there having the same problem. It would be great if you could give any feedback, share anything that helps the community.
Click to expand...
Click to collapse
I honestly didn't see this post before. You really covered every detail very well. So far, returning my G3 to stock and replacing the battery has fixed it for me. Weird. I know. I did try 90% of the things on your "things that don't work" list and you are correct. They don't work.
wlanmac 02/00/00/00/00, Bluetooth is OK
Hey, i just got an LG LS990 with same Wifi issue and i'm ready to try so WITNESS ME!
Thanks for an amazing and detailed post lml
Simply awesome.
I have similar issue with my Nexus 5x. It is QCA6174 hw 3.2 chip, lspci does not detect this chip any more. I am going to do a little bit investigation from device driver (cnss) perspective. It enables one GPIO to provide power to this WiFi chip, I will try read back this GPIO status to see if it is enabled. I do not have the schematics, I do not know how to check if power is supplied to this wifi chip.
lspci used to show below:
$ ./lspci
00:00.0 PCI bridge: Airgo Networks Inc Device 0300 (rev ff)
01:00.0 Network controller: Atheros Communications Inc. Device 003e (rev ff) (this is qca6174)
If kernel driver investigation does not reveal anything helpful, I will ask other guys to replace the chip.
I thought it is because of vendor partition is accidentally wiped out, maybe it is unlikely.
---------- Post added at 08:49 PM ---------- Previous post was at 08:40 PM ----------
As Bluetooth can not be turned either, I am tending to think this is hardware related as well. As described previously, I will see if I can check that gpio status.
investigating
xbing6 said:
I have similar issue with my Nexus 5x.
(...)
I am going to do a little bit investigation
Click to expand...
Click to collapse
Hi xbing, and thank you for your feedback! :good:
I am really curious and looking forward to hear the results of your investigation! I believe that in your case, too, the Wi-Fi/BT chip is not being supplied correctly due to a defective soldering. Note that I don't think that the chip itself is defective, only the contacts between the chip and the main board. So, before replacing the chip, I'd recommend to first try what I've written in 6.a (or check my update/summary above).
Keep us posted about everything you find out!
Sprint declined to fix my LS990 due to "water damage" being the reason for it not working, and wanted to charge me a $150 deductible for a $100 phone. Shimming the WiFi chip against the metal covering with some thermal pad I had lying around and adding a bit of sticky foam on top of the ribbon cable for the camera worked great! Much thanks!
Tomcat5 said:
Sprint declined to fix my LS990 due to "water damage" being the reason for it not working, and wanted to charge me a $150 deductible for a $100 phone. Shimming the WiFi chip against the metal covering with some thermal pad I had lying around and adding a bit of sticky foam on top of the ribbon cable for the camera worked great! Much thanks!
Click to expand...
Click to collapse
Any idea if thermal paste/grease could work?
unlikely
NavHur said:
Any idea if thermal paste/grease could work?
Click to expand...
Click to collapse
Hi NavHur,
since the problem is mostly caused by a loose Wi-Fi chip, respectively a defective solder joint, using thermal paste or grease is unlikely to help; again, what you need to do is to have your Wi-Fi chip pushed against your main board. You can use your imagination on how to accomplish this; what Tomcat5 described he did ultimately led to exactly having his chip being pressed against the board.
Of course you are free to try whatever you want - if you find new solutions please post some feedback.
Good luck.
NimbleWeasel said:
Hi NavHur,
since the problem is mostly caused by a loose Wi-Fi chip, respectively a defective solder joint, using thermal paste or grease is unlikely to help; again, what you need to do is to have your Wi-Fi chip pushed against your main board. You can use your imagination on how to accomplish this; what Tomcat5 described he did ultimately led to exactly having his chip being pressed against the board.
Of course you are free to try whatever you want - if you find new solutions please post some feedback.
Good luck.
Click to expand...
Click to collapse
Thanks you so much, I placed a small piece of plastic above the wifi chip and one next to the camera lens. Now the wifi works fine. However my screen was pushed up so it bended a little. The faulty thing was my battery, not the added plastic. I compared mine with the one of a friend, mine was 1 mm bigger. (also with the battery of my friend's g3 the screen was fine)
I'll be changing it soon.
same problem as u but sometimes wifi works(mainly fully charged) and sometimes dont
i have lg g2 D802 model. It had a wifi problem as u shown in your videos,my phone also behaves same like yours but sometimes it works normally like while charging,works like 2 or 3 times a day(for 5-10 min).please tell me whether my phone got ic problem or software issue
Pratap94 said:
i have lg g2 D802 model. It had a wifi problem as u shown in your videos,my phone also behaves same like yours but sometimes it works normally like while charging,works like 2 or 3 times a day(for 5-10 min).please tell me whether my phone got ic problem or software issue
Click to expand...
Click to collapse
Hi Pratap94,
nobody, neither here in this forum nor elsewhere in the internet, will be able to give you a reliable answer without having a *physical* look at your phone. Nobody.
However, I can give you my opinion, based on the stuff you wrote: The fact that it works normally sometimes, specially while charging (probably it heats up in the process?), indeed seems to indicate a hardware issue. I believe you have a loose Wi-Fi chip i.e. a defective solder joint, like I had on my LG G2 D802 as well. I solved my problem by doing the stuff I described in 6.a.
Good luck.
Thank you so much
NimbleWeasel said:
Hello all,
first of all, I want to thank brysclar and xbing6 for their valuable feedback! Thanks a lot guys! :good:
Problem solved good bless you!! the problem is fix in that youtube video XD
Click to expand...
Click to collapse
Sadly step 6.a did not help me. Well, it worked for first 5-10 minutes and then back again.
Olzhas18 said:
Sadly step 6.a did not help me. Well, it worked for first 5-10 minutes and then back again.
Click to expand...
Click to collapse
Hi Olzhas18,
that might be an indication that your WiFi chip is still a bit loose and is not sitting tight enough on the main board. On LG G2, it is difficult to push the chip against the board because it's covered by a metal cover...
Also, did you check out this video: https://www.youtube.com/watch?v=OJkdva2iOag ?
Good luck!
NimbleWeasel said:
Hi Olzhas18,
that might be an indication that your WiFi chip is still a bit loose and is not sitting tight enough on the main board. On LG G2, it is difficult to push the chip against the board because it's covered by a metal cover...
Also, did you check out this video: https://www.youtube.com/watch?v=OJkdva2iOag ?
Good luck!
Click to expand...
Click to collapse
Thank you this tip and this whole thread. I have seen this video, but still the same effect. 5-10 minutes, I can rean some news and back to flashing. I'm going to buy Huawei Honor 8 soon, it was the last chance to recover my G4. I doubt I will purchase any other phone from LG.
Same boat
But bluetooth working
In cm roms also wifi tethring can be onn
But u cnt turn onn wifi
I had the same issue, can't turn on Wifi after factory reset.
I turn off my device off after one hour and reboot wifi was OK but when I want to upgrade some apps iwifi turn of again and my phone reboot with no SIM card.
I do "6.a Sellotape / Scotch tape" + a creedit card cut with this video https://www.youtube.com/watch?v=6_0jzp65eLY#t=73.319872
My LG G2 works fine

NAND Replacement for the TF700

This was a PM for @timduru but it wouldn't send.. So here it is for anyone and everyone that can help.
I'm thinking of replacing the nand on the tf700.. Can you help me source the right pin compatible chip? .. I don't have big plans for the tab, I only use it to read books and watch movies.. But the lag bugs me and I want to attempt the chip replacement job. I'm totally clueless as to the fastest chip that could be supported with the right pin configuration.
But I'm hopeful i could drop something beastly and perhaps give it a ram upgrade if the RAM is a separate and easily source-able chip.
I believe the fastboot mode along with the saved "wheeler" blobs will enable me write firmware and start the tablet with the blank new chip.
If I'm successful, i could do the same for other members who want to keep the development of the tab going(with them sharing the risk of failure/I'm not an idiot, but a botched solder job is possible) .. So that we can have one last stable ROM until the eventual death of the tab.
Thank you,
Please keep us updated on what you find out. I am still addicted to this tablet and use both the 700 and the 201 (for different functions of course!) I would also be curious about battery options out there..
Chip Replacement for the TF700
I'm thinking of replacing the nand on the tf700.. Can you help me source the right pin compatible chip? .. I don't have big plans for the tab, I only use it to read books and watch movies.. But the lag bugs me and I want to attempt the chip replacement job. I'm totally clueless as to the fastest chip that could be supported with the right pin configuration.
But I'm hopeful i could drop something beastly and perhaps give it a ram upgrade if the RAM is a separate and easily source-able chip.
I believe the fastboot mode along with the saved "wheeler" blobs will enable me write firmware and start the tablet with the blank new chip.
If I'm successful, i could do the same for other members who want to keep the development of the tab going(with them sharing the risk of failure/I'm not an idiot, but a botched solder job is possible) .. So that we can have one last stable ROM until the eventual death of the tab.
Thank you,[/QUOTE]
Hi,
once I started going about it as well and found Elpida EDJ4216EFBG in our unit to seem very similar to the Samsung K4B2G1646C ddr3 chip.
Pinout seems very close except for T7 which is not connected in elpida but its an address pin A14 in samsung I do not know the implications had these chips to be interchanged. Also the ram in my unit is a hynix. Good Luck.
evimarn said:
Hi,
once I started going about it as well and found Elpida EDJ4216EFBG in our unit to seem very similar to the Samsung K4B2G1646C ddr3 chip.
Pinout seems very close except for T7 which is not connected in elpida but its an address pin A14 in samsung I do not know the implications had these chips to be interchanged. Also the ram in my unit is a hynix. Good Luck.
Click to expand...
Click to collapse
I'll look into the ram when I get the chance.. I was hoping that the pinouts are standard.. I don't think that data lines are redundant in general.. We'll have to ask around or try it for ourselves.
You don't happen to already know any super fast NAND chips with the same pinouts or even the mmc versions supported by the tegra?
Can you PM me the datasheets?
If you manage to pull this off, you will all be my heroes.
PortableTech said:
If you manage to pull this off, you will all be my heroes.
Click to expand...
Click to collapse
I'm a dentist.. I'm looking for someone to do the heavy technical work because searching for these things even with my knowledge is hard.. I'm sure there are ways for design that are learned in engineering school or on the job that I'm not ever going to learn...
The work with steady hands can be left to me.. I already have a few super hard reballing feats under my belt.
I'm really puzzled as how to approach this..
I will go through my library and find you the NAND datasheet as I've downloaded it years ago.
I guess i will start at digi-key and mouser and see what happens.
Wish me luck.
AbdouRetro said:
I'll look into the ram when I get the chance.. I was hoping that the pinouts are standard.. I don't think that data lines are redundant in general.. We'll have to ask around or try it for ourselves.
You don't happen to already know any super fast NAND chips with the same pinouts or even the mmc versions supported by the tegra?
Can you PM me the datasheets?
Click to expand...
Click to collapse
Basically if memory serves me right the samsung are the best bet.

PX5 cannot boot anymore (SOLVED)

UPDATE 24.11.20
I have recovered my HU by reading the whole night on this forum and TO THE AMAZING work of several people here.. especially GREAT GREAT thanks to marchnz and to scorillo_ro I build myself the USB cable and followed all the instructions I could find. With some moments of headache .. finally I flashed a new ROM and it booted up!!!
I have to go down on my knees to you guys for the super AMAZING work you have done. Wihtout you I woulld be now 180€ poorer. (new HU).
___________________________
When booting I get this errors...
I got a MTCE_LM PX5 unit (8Core A53 CPU 2GB RAM)
It is always very difficult to enter Recovery so I tried several times but it doesnt work. Either I just didnt mage it right or the recovery is broken.
In the pictures you can see 2 different messages. I have the feeling the long message version is when it normally tries to boot into the OS but fails.
The short message looks like when I managed to get into recovery reboot but it fails too.
Or its the same message .. it just blinks up for 10ms or something and dissapears and then blinks back after 5 secods ... I had to take like 20 photos to catch it. So maybe its the same actually.
Anyone has a clue what I can do from now on?
Great to hear another success story.
It took alot of effort to develop the method, for which was made possible by a member posting the schematic diagram to the forums for the benefit of all. Your post helps other too, so thanks!
Thanks again for the endless hours you put into developing the esiest method possible (for this SOM).
I am REALLY pissed at the Chinese somehow. They develop great stuff sometimes but fail to think over the edge. It is so easy to destroy your OS by small or stupid mistakes. And then there is no OTG to easily reflash the rom. I mean the hardware supports it. They could (and luckily and finally some new models support OTG on at least one USB port right away). But why was this not implemented right from the first designs for the headunits is puzzling me.
I would love to help anyone who needs help. But I have the PX5 HCT V4 SOM so you people wrote exactly how to do it for this specific SOM... I am not sure I can add anything of what wasnt said already.
I just had 2 main issues. The USB cable was found but not recognized at first.
So what I figured out was that you should not use more than 2 resistors to make the voltage division (thats what I did first) and I just had 2.8V on the division. I did it fast and not clean, means. No really good soldering connections.
Then I rebuild the whole thing used a good cable just 2 resistors (2kOhm and 3.3kOhm) and I soldered everything as clean and as compact as possible with least distanced to each part. So it gave me 3.1V on the division.
This was recognized immediately. Ahh.. and it helps too if you can use some contact spray for electronic parts. Because the pins sometimes do not sit well inside the SOM board.
Then the flashing of the ROM didnt want to work. It gave me an error on downloading the firmware.
Solution was to simply erease the flash memory.
But everyone who goes to your thread and reads at least the first 20 pages gets rather the clue on the minor issues. But its actually all written in there... just need to read it

Data recovery from hard-bricked phone

I have a Pixel XL that's hardbricked. Took it to a GSM shop they said the charging port works but something something CPU fried. No gsm shop in our city can fix this apparently but he heard that some folks could do it in New York City.
I don't want to recover the phone, just the data on it. Do you guys know shops that can do this ?
gtech99 said:
I have a Pixel XL that's hardbricked. Took it to a GSM shop they said the charging port works but something something CPU fried. No gsm shop in our city can fix this apparently but he heard that some folks could do it in New York City.
I don't want to recover the phone, just the data on it. Do you guys know shops that can do this ?
Click to expand...
Click to collapse
Not at any reasonable price point. What happened to the phone? Recovering the data from the flash devices would involve prohibitively expensive forensic data recovery, to the point of removing the flash devices from the board and interfacing with them using special tools. The people who have the means and the knowledge to do this are few and far between. Assuming there's no physical damage, someone with the Qualcomm Product Support Tool software and the appropriate binaries could potentially perform a low level reflash so the phone will boot...but again, the people who are actually able to do this are few and far between, assuming they even have the necessary files (which are not publicly available). The average repair shop will just replace the board, which means all the data is never recovered.
gtech99 said:
I have a Pixel XL that's hardbricked. Took it to a GSM shop they said the charging port works but something something CPU fried.
Click to expand...
Click to collapse
Speaking of a fried CPU, it means due to overheating CPU’s electrical components like transistors, diodes or capacitors are burned up. You will find overheating happened with some CPUs which didn’t have any fail-safe features or were overclocked by pushing high voltage. Sometimes using a faulty motherboard and faulty PSU can do this type of damage.becauseSo, you if you really ended up with a fried CPU, what is quite rare these days because, as said, modern CPUs have advanced thermal protection ( CPU will shut down automatically if it reaches a high temperature. If CPU temperature rises high due to high clock speed then it reduces the clock speed to a lower level ), you will have the worst luck to recover data from phone.
Note: it’s not possible to fix a fried CPU. Try to replace it with a new one.
V0latyle said:
Not at any reasonable price point. What happened to the phone? Recovering the data from the flash devices would involve prohibitively expensive forensic data recovery, to the point of removing the flash devices from the board and interfacing with them using special tools. The people who have the means and the knowledge to do this are few and far between. Assuming there's no physical damage, someone with the Qualcomm Product Support Tool software and the appropriate binaries could potentially perform a low level reflash so the phone will boot...but again, the people who are actually able to do this are few and far between, assuming they even have the necessary files (which are not publicly available). The average repair shop will just replace the board, which means all the data is never recovered.
Click to expand...
Click to collapse
I haven't done anything special with this phone. Never rooted it or installed other bootloaders, etc. It was a generic bland Pixel XL. It might have overheated a few times in the summer when I was using it in my car for Waze but otherwise nothing.
Before it shutdown for good it had some strange reboots and I think I recall there was some Pixel bug that was causing that. After doing that for a few weeks it stopped turning on completely.
Isn't a procedure like this available for the Pixel ?
https://flashfixers.com/recover-data-dead-phone-chip-off-data-recovery/
gtech99 said:
I haven't done anything special with this phone. Never rooted it or installed other bootloaders, etc. It was a generic bland Pixel XL. It might have overheated a few times in the summer when I was using it in my car for Waze but otherwise nothing.
Before it shutdown for good it had some strange reboots and I think I recall there was some Pixel bug that was causing that. After doing that for a few weeks it stopped turning on completely.
Isn't a procedure like this available for the Pixel ?
https://flashfixers.com/recover-data-dead-phone-chip-off-data-recovery/
Click to expand...
Click to collapse
That's what I was referring to by removing the flash device from the PCB. You would need fairly specialized tools, incluing a reader that's able to interface with the chip, and you'd have to have significant knowledge of how to interpret the raw data as the actual file structure. If you can find someone who thinks they can do this, good luck...but if it were me, I'd be charging about $150 an hour to do it.
And, this is all assuming that the data isn't encrypted. If it is (which Android does by default) then you're SOL.
V0latyle said:
That's what I was referring to by removing the flash device from the PCB. You would need fairly specialized tools, incluing a reader that's able to interface with the chip, and you'd have to have significant knowledge of how to interpret the raw data as the actual file structure. If you can find someone who thinks they can do this, good luck...but if it were me, I'd be charging about $150 an hour to do it.
And, this is all assuming that the data isn't encrypted. If it is (which Android does by default) then you're SOL.
Click to expand...
Click to collapse
Ah, ok. I'd pay 300$ to have this recovered is that reasonable ? Or it might be way more than that ? Guess I need to find a shop that does this sort of thing
gtech99 said:
Ah, ok. I'd pay 300$ to have this recovered is that reasonable ? Or it might be way more than that ? Guess I need to find a shop that does this sort of thing
Click to expand...
Click to collapse
Best of luck to you, honestly I think the money would be better spent elsewhere.

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