[DISC] Changing motherboards between different models - Samsung Galaxy S7 Edge Guides, News, & Discussion

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.
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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.
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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?
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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...
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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
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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.
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Click to collapse
Well I tried a few times after that and after letting it on a charger, still no response.
nitrousĀ² 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

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

Replaced Digitizer, now No Internet Connection in status bar

Like the title says, I replaced the digitizer, but now my phone either isn't recognizing my SIM card, or somehow the antenna isn't working. I can connect to my home wifi network, I have full audio, full capacitive buttons and vibration....but signal bar just shows empty (i'm using CM10).
I've put my SIM into my other phone, everything works fine. I've checked all of the connectors on the motherboard, everything is connected and nothing is loose or pinched anywhere. Can someone give me a layout of which connections control what?
thanks.
Remember that there's actually two different antennas. My suggestion would be to recheck each connection and make sure there's a solid click when you connect it
Sent from my LG-P999 using xda premium
rtotheichie said:
Remember that there's actually two different antennas. My suggestion would be to recheck each connection and make sure there's a solid click when you connect it
Sent from my LG-P999 using xda premium
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the top connector came off the wire when I snapped it from the motherboard. I crimped the wire back in place but maybe I sould solder.
Crimp should work if the center pin is still making contact with the wire. Soldering shouldn't hurt anything that I can think of
Sent from my LG-P999 using xda app-developers app
guitarist5122 said:
Crimp should work if the center pin is still making contact with the wire. Soldering shouldn't hurt anything that I can think of
Sent from my LG-P999 using xda app-developers app
Click to expand...
Click to collapse
Update, I've purchased a replacement micro-coax cable, that fits correctly, but still have no signal coming to my phone for whatever reason. Any ideas, maybe getting a crappy g2x for parts and using it's cable?
stevew84 said:
Update, I've purchased a replacement micro-coax cable, that fits correctly, but still have no signal coming to my phone for whatever reason. Any ideas, maybe getting a crappy g2x for parts and using it's cable?
Click to expand...
Click to collapse
Where did you get the cable from?
Did you test the continuity of the cable's wire?
Core Memory said:
Where did you get the cable from?
Did you test the continuity of the cable's wire?
Click to expand...
Click to collapse
This is what I ordered:
http://www.digikey.com/product-search/en?x=12&y=15&lang=en&site=us&KeyWords=A36224-ND
stevew84 said:
This is what I ordered:
http://www.digikey.com/product-search/en?x=12&y=15&lang=en&site=us&KeyWords=A36224-ND
Click to expand...
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That should work. Are all the other internal connectors fully seated?
Core Memory said:
That should work. Are all the other internal connectors fully seated?
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Yup, not too sure what's happening. I literally did NOTHING else to the phone except accidentally rip off the connection on the lower end of the phone. I still get Wifi, so I know nothing internally is broken. I need to call tmo on the off chance this phone got locked due to previous owner payment or reported lost or stolen. It was an LG branded, g2x, though, which doesn't get sold throught tmo.
stevew84 said:
Yup, not too sure what's happening. I literally did NOTHING else to the phone except accidentally rip off the connection on the lower end of the phone. I still get Wifi, so I know nothing internally is broken. I need to call tmo on the off chance this phone got locked due to previous owner payment or reported lost or stolen. It was an LG branded, g2x, though, which doesn't get sold throught tmo.
Click to expand...
Click to collapse
The LG brand could mean that the digitizer was previously replaced. It sounds like a very peculiar situation you are in. Replacement parts idea is probably best if you have looked over everything very carefully and can't visually find anything wrong. Did you use a hair dryer or other heat source to get the digitizer off? Perhaps the radio portion received to much heat and fried. That the only thing I can think of.
guitarist5122 said:
The LG brand could mean that the digitizer was previously replaced. It sounds like a very peculiar situation you are in. Replacement parts idea is probably best if you have looked over everything very carefully and can't visually find anything wrong. Did you use a hair dryer or other heat source to get the digitizer off? Perhaps the radio portion received to much heat and fried. That the only thing I can think of.
Click to expand...
Click to collapse
When I first did the repair, I ripped the ribbon from mother board to digitizer, not realizing it was there in the first place. The screen separated from the digitizer pretty easily, no heat required.
The new piece I ordered had the digitizer and outside bezel all attached as one piece, which would normally be two pieces. While constructing everything, I forgot that little rubber/plastic piece that fits near the front facing camera, so I detached the mother board connections, then went down to the antenna area and disconnected the micro coax and the connector slipped off the cable altogether. I put the exposed wire back into the connector, restarted the phone, and there has been no signal ever sense.
The last thing I'm going to try is getting an OEM micro coax from either a P990 or P999. I feel kind of stupid for worrying about this, since it's an old phone with limited development at the moment, plus I have another phone already. But since I bought an entirely new shell, I want to fix this damn thing and probably just sell it.
stevew84 said:
Yup, not too sure what's happening. I literally did NOTHING else to the phone except accidentally rip off the connection on the lower end of the phone. I still get Wifi, so I know nothing internally is broken. I need to call tmo on the off chance this phone got locked due to previous owner payment or reported lost or stolen. It was an LG branded, g2x, though, which doesn't get sold throught tmo.
Click to expand...
Click to collapse
Canadian G2X/P999 are branded LG and are known as Optimus 2X even though they are not the P990 Optimus 2X which is/was also sold in Canada, each model sold by different service providers operating on different cell radio bands. At a point, T-Mobile was supplying LG branded G2X/P999 phones as replacements. You probably have one of those or, if you bought it from someone in Canada or who was in Canada that would also explain why yours is branded LG.
If you shorted the antenna cable's internal wire to its shield that would short-circuit the cell radio's output which may have damaged the hardware if the phone transmitted while there was a short-circuit.
Core Memory said:
Canadian G2X/P999 are branded LG and are known as Optimus 2X even though they are not the P990 Optimus 2X which is/was also sold in Canada, each model sold by different service providers operating on different cell radio bands. At a point, T-Mobile was supplying LG branded G2X/P999 phones as replacements. You probably have one of those or, if you bought it from someone in Canada or who was in Canada that would also explain why yours is branded LG.
If you shorted the antenna cable's internal wire to its shield that would short-circuit the cell radio's output which may have damaged the hardware if the phone transmitted while there was a short-circuit.
Click to expand...
Click to collapse
I think what I need to do, if i wanted to keep this phone, is the buy a crappy g2x and use it's internal motherboard with antenna and coax cable.
Does anyone know what the board is called at the bottom of the phone, near the charging port? It's where one end of the micro coax cable connects. The other end is near the middle of the phone, on the main mother board.
I'm wondering since the board at the bottom had the problem, if I were to replace that.
Here's the repair manual:
http://www.scribd.com/doc/84937521/70/EXPLODED-VIEW
There is a way to test the cell phone radio to determine if it works but it involves installing some Qualcomm software, QPST and QXDM, which are professional tools for monitoring, testing and modifying the phone's Qualcomm cell radio characteristics. My post about how to fix the P999 IMEI has the download links and instructions for setting QPST up: http://forum.xda-developers.com/showthread.php?t=1942417 I'll find the QXDM link and installation instructions and post it in this thread too.
Here's QXDM 03.11.36 http://www.mediafire.com/?tmzmngemgmm
Install them both as Administrator.
Core Memory said:
There is a way to test the cell phone radio to determine if it works but it involves installing some Qualcomm software, QPST and QXDM, which are professional tools for monitoring, testing and modifying the phone's Qualcomm cell radio characteristics. My post about how to fix the P999 IMEI has the download links and instructions for setting QPST up: http://forum.xda-developers.com/showthread.php?t=1942417 I'll find the QXDM link and installation instructions and post it in this thread too.
Here's QXDM 03.11.36 http://www.mediafire.com/?tmzmngemgmm
Install them both as Administrator.
Click to expand...
Click to collapse
Awesome, I'll give it a shot when I get home, see what happens.
stevew84 said:
Awesome, I'll give it a shot when I get home, see what happens.
Click to expand...
Click to collapse
I've written up a procedure to determine if a phone's cell radio is working.
http://forum.xda-developers.com/showpost.php?p=33779273&postcount=1
Finally fixed the damn thing, adjusted the length on either side of the mico coax, the cable isn't being pinched anymore so it works fine. I have a slight problem, though, I have some bright light bleeding from the middle left, and top right of the screen. Maybe because the LED isn't seated flush against the digitizer? Is that what would cause this?
It's minimal, and I don't want to take it apart, but still curious.
Around the screen edge there should be attached to the digitizer a thin foam gasket. If it is missing a piece of the thin foam or if it somehow got disturbed or is not there it most likely is where the bleed is comming from.
Eddie
Sent from my AT100 using xda premium

[Q] Signal but no service

Hi! After repairing my Nexus 5 from a water damage (changed all components except the screen and back cover), the phone shows that I have good celluar signal, but no service. The celluar data is working, but I cant make calls and send SMS. I have checked with different antennas, but with no change. What is wrong? Thank you
Well,
Hard to tell. Maybe a hardware issue with the motherboard ? (this coud explain why somebody sold it to you )
I wonder how much you paid for the replacement of all these components...
Have to say....water is evil and replacing things often ends up with discovering more is damaged. In the end, replacing water damaged devices usually ends up being the better choice.
Flash stock and if still no go, it's hardware. Try another radio maybe.
Not much else you can do.
KJ said:
Have to say....water is evil and replacing things often ends up with discovering more is damaged. In the end, replacing water damaged devices usually ends up being the better choice.
Flash stock and if still no go, it's hardware. Try another radio maybe.
Not much else you can do.
Click to expand...
Click to collapse
I'll second it. Pretty much out of options now. This is the reason water damage is so frowned upon by then OEMs.
Sent from my Nexus 5 using Tapatalk
Well,
Hard to tell. Maybe a hardware issue with the motherboard ? (this coud explain why somebody sold it to you )
I wonder how much you paid for the replacement of all these components...
Click to expand...
Click to collapse
It worked fine for 2 weeks after I repaired it, but then I suddenly lost the service. I paid 170 dollars for a new phone with cracked screen and replaced all the components except the screen...
Try dialing *#*#4636#*#* and go into phone information, if you have your phone on LTE when you scroll down you will find LTE only, click on it and try changing it to different things

LG Velvet-Service Disabled

I have a backup Verizon LG Velvet. I have the LG V60 as my main phone. With or without a sim the Velvet states "Service Disabled" and the bars have a small x next to them. I and Verizon have tried all the normal troubleshooting tips available.
Factory reset
Airplane mode on/off
Network reset and so on.
The sim works fine in other phones I tested so it's not the sim giving the issue.
Verizon tried on their end to get the phone to work but still kept getting the same service disabled. I'm down to thinking it's more a hardware issue than it is software. But not sure which internal module I should replace. The logic board or the lower PCB.
I even tried to lookup flashing the stock firmware to see if that helps via LGUP and LG Flash Tool. Neither I could get to work to achieve that goal.
Anyway, I was wondering if anyone could share an assist as to what is wrong or how to rectify the issue to the get the service to work on this phone. Anyone have any idea? Thanks.
Maybe the C port pcb. I know on Samsung phones one of the failure modes with the C port pcb is lose of internet and phone. It gets a lot of wear and tear. If it applies to this phone, don't know.
An experienced repair tech is probably your best shot...
blackhawk said:
Maybe the C port pcb. I know on Samsung phones one of the failure modes with the C port pcb is lose of internet and phone. It gets a lot of wear and tear. If it applies to this phone, don't know.
An experienced repair tech is probably your best shot...
Click to expand...
Click to collapse
That's also what I thinking when I mention replacing the lower PCB. I will give that a shot. And then go further if that doesn't help. Thnx
prahsper said:
That's also what I thinking when I mention replacing the lower PCB. I will give that a shot. And then go further if that doesn't help. Thnx
Click to expand...
Click to collapse
They are generally inexpensive. Of course the elephant in the room is it could be the mobo instead... I hope it's the former.
It's also possible that the firmware was corrupted. A freak random hit by a high energy particle can do exactly that. A reflash of the stock rom be the next thing to try after the port pcb or maybe before depending on what you think.
blackhawk said:
They are generally inexpensive. Of course the elephant in the room is it could be the mobo instead... I hope it's the former.
It's also possible that the firmware was corrupted. A freak random hit by a high energy particle can do exactly that. A reflash of the stock rom be the next thing to try after the port pcb or maybe before depending on what you think.
Click to expand...
Click to collapse
Yes. The reflash was my first choice but couldn't find the right program to work with this phone and the right KDZ file I was having trouble finding. I kept getting errors with LGUP and Flash Tool.
prahsper said:
Yes. The reflash was my first choice but couldn't find the right program to work with this phone and the right KDZ file I was having trouble finding. I kept getting errors with LGUP and Flash Tool.
Click to expand...
Click to collapse
I change my views about flash memory corruption after watching that vid. The volume of bit drops on the Apollo flight is jaw dropping.
blackhawk said:
I change my views about flash memory corruption after watching that vid. The volume of bit drops on the Apollo flight is jaw dropping.
Click to expand...
Click to collapse
I may have found my issue. I put the logic board under my scope and found some damage to the lower PCB like I thought and you mentioned. There is a "+" and "-" connectors above the charging port where the plate of the speaker connects to. The "+" connector is missing.
I ordered another charging port PCB and when that arrives, I will see if that fixes the issue and let you know.
prahsper said:
I may have found my issue. I put the logic board under my scope and found some damage to the lower PCB like I thought and you mentioned. There is a "+" and "-" connectors above the charging port where the plate of the speaker connects to. The "+" connector is missing.
I ordered another charging port PCB and when that arrives, I will see if that fixes the issue and let you know.
Click to expand...
Click to collapse
So as it turns out, it wasn't just the lower pcb. Although it did need replacement as well. But it was the main pcb. So I ordered the main pcb from eBay for 60 dollars and the seller ended up sending me the entire phone in perfect condition and perfect working condition. LOL-go figure.

MOTO G Stylus 5G 2022 Connection issue

I bought a Moto G Stylus 5G 2022 ( XT2215-4 ) to fix and sell.. I replaced the display and battery and went to test everything and it would pickup WIFI but no cell signal / data. The phone detects there's a sim card but it's like it just can't read it.
So I thought it could only be 1 of 2 issues.
1: A Antenna issue or 2: The sim reader on the logic Board is faulty.
I inspected the antennas that run from the Logic Board down to the Daughter Board and they both seem to be right and the connections snug.
// Side Question: Are there any other antennas hid out somewhere other than the two Black and white coaxial antennas that's in the back of the phone //
So I figured it must be the sim reader is faulty so I ordered a parts phone with the defects listed on the parts phone as broken display glass everything else is working..
So I swapped out the Logic Board and Daughter Board with the Antennas still attached. I go to test the phone and I still have the same dang issue with it detecting the SIM but not connecting..
I think it would be almost impossible for me to get 2 phones back to back from different people with the same exact problems..
Would anyone happen to have any ideas?
Thanks In Advance
Shawn77371 said:
I bought a Moto G Stylus 5G 2022 ( XT2215-4 ) to fix and sell.. I replaced the display and battery and went to test everything and it would pickup WIFI but no cell signal / data. The phone detects there's a sim card but it's like it just can't read it.
So I thought it could only be 1 of 2 issues.
1: A Antenna issue or 2: The sim reader on the logic Board is faulty.
I inspected the antennas that run from the Logic Board down to the Daughter Board and they both seem to be right and the connections snug.
// Side Question: Are there any other antennas hid out somewhere other than the two Black and white coaxial antennas that's in the back of the phone //
So I figured it must be the sim reader is faulty so I ordered a parts phone with the defects listed on the parts phone as broken display glass everything else is working..
So I swapped out the Logic Board and Daughter Board with the Antennas still attached. I go to test the phone and I still have the same dang issue with it detecting the SIM but not connecting..
I think it would be almost impossible for me to get 2 phones back to back from different people with the same exact problems..
Would anyone happen to have any ideas?
Thanks In Advance
Click to expand...
Click to collapse
Can you confirm that the device's IMEI is intact/uncorrupted?
Since you swapped the radio, you might need to flash a compatible modem.img in order to make a proper connection, especially if the device is from a different region than where the device is being used.
Both phones IMEI's showed clean when I did the PhoneCheck report before buying them.
Both phones are US models 1 came from California and the other Florida if I remember correctly.
Both are on the TMobile US network
I've never had a phone give me such a hard time at this point I think any profit to be made on this phone is gone so I'll probably just give it away to someone truly in need.
Pending I get it working right and I absolutely refuse to let a phone beat me lol
Droidriven said:
Can you confirm that the device's IMEI is intact/uncorrupted?
Since you swapped the radio, you might need to flash a compatible modem.img in order to make a proper connection, especially if the device is from a different region than where the device is being used.
Click to expand...
Click to collapse
Both phones IMEI's showed clean when I did the PhoneCheck report before buying them.
Both phones are US models 1 came from California and the other Florida if I remember correctly.
Both are on the TMobile US network
I've never had a phone give me such a hard time at this point I think any profit to be made on this phone is gone so I'll probably just give it away to someone truly in need.
Pending I get it working right and I absolutely refuse to let a phone beat me lol
Shawn77371 said:
Both phones IMEI's showed clean when I did the PhoneCheck report before buying them.
Both phones are US models 1 came from California and the other Florida if I remember correctly.
Both are on the TMobile US network
I've never had a phone give me such a hard time at this point I think any profit to be made on this phone is gone so I'll probably just give it away to someone truly in need.
Pending I get it working right and I absolutely refuse to let a phone beat me lol
Click to expand...
Click to collapse
I didn't ask if the IMEI were intact when you bought them, I asked if they are intact now after you've altered things.
Droidriven said:
I didn't ask if the IMEI were intact when you bought them, I asked if they are intact now after you've altered things.
Click to expand...
Click to collapse
Yes
Shawn77371 said:
Yes
Click to expand...
Click to collapse
Is the SIM activated and has the device been activated on the network?
You've changed out all the hardware and the issue still persists, this indicates that it is a software issue. Have you tried connecting it to Motorola's Rescue and Smart Assistant flashing software and letting it scan the device to find the correct firmware and then flash the firmware that it retrieves?
Well I can confirm you're 100% correct that it's a software issue..
But still very buggy. After I do a rescue with Motorola's Rescue and Smart Assistant it somewhat fixes the issue..
It will work like it should for about the first 5 minutes and then it will revert back to the original issue. It's kinda like it receives a signal to kick it offline or something..
So just to triple check I logged in to my PhoneCheck portal and pulled yet another IMEI report for the phone and everything came out clean and clear. So just to make sure PhoneCheck wasn't miss reporting I pulled a report with my IMEI Pro account and it pulled the same results as PhoneCheck did ( Free & Clear )
So then I thought it could be an update that gets installed during the setup process that is causing it to bug out like it is. So I tried it another time and this time I told it to not install updates on setup and killed the WiFi just to be sure it had no way to connect and install any updates during setup but no dise it still gives me the same buggy results..
I swear I've been buying, fixing and reselling phones and tablets now for 5yrs and have never had a device give me such an issue..
I think it's time to just wash my hands and sell this phone as a parts only phone and start putting my time and attention into a different device..
I have a OnePlus 10T that just needs a new ear speaker and I think it will make me more money than this phone after you factor in how much time I wasted trying to get this phone to work and the money spent on the 2nd parts phone to use the hardware out of it
Shawn77371 said:
Well I can confirm you're 100% correct that it's a software issue..
But still very buggy. After I do a rescue with Motorola's Rescue and Smart Assistant it somewhat fixes the issue..
It will work like it should for about the first 5 minutes and then it will revert back to the original issue. It's kinda like it receives a signal to kick it offline or something..
So just to triple check I logged in to my PhoneCheck portal and pulled yet another IMEI report for the phone and everything came out clean and clear. So just to make sure PhoneCheck wasn't miss reporting I pulled a report with my IMEI Pro account and it pulled the same results as PhoneCheck did ( Free & Clear )
So then I thought it could be an update that gets installed during the setup process that is causing it to bug out like it is. So I tried it another time and this time I told it to not install updates on setup and killed the WiFi just to be sure it had no way to connect and install any updates during setup but no dise it still gives me the same buggy results..
I swear I've been buying, fixing and reselling phones and tablets now for 5yrs and have never had a device give me such an issue..
I think it's time to just wash my hands and sell this phone as a parts only phone and start putting my time and attention into a different device..
I have a OnePlus 10T that just needs a new ear speaker and I think it will make me more money than this phone after you factor in how much time I wasted trying to get this phone to work and the money spent on the 2nd parts phone to use the hardware out of it
Click to expand...
Click to collapse
Could the device possibly have been blacklisted before it was sold to you, either by being reported lost/stolen or due to the previous owner not paying their bill? Even with WiFi and mobile data off, it still communicates with the network on the cellular side of the radio, it could be registering on the cellular side then getting kicked off due to being blacklisted.
Droidriven said:
Could the device possibly have been blacklisted before it was sold to you, either by being reported lost/stolen or due to the previous owner not paying their bill? Even with WiFi and mobile data off, it still communicates with the network on the cellular side of the radio, it could be registering on the cellular side then getting kicked off due to being blacklisted.
Click to expand...
Click to collapse
On the IMEI reports it shows clean under the general blacklist area.
Then under the carrier blacklist check it shows clean.
Also keep in mind that the original device has this issue of not connecting so I bought a parts phone from a different person so I could transfer all it's internals over and the issue still persist.
While it's very possible to get two phones back to back from different people to have the same issue I would think that it's very unlikely that it would happen.
I was reading on Motorola's website forums that with the 2021 model a lot of peoples phones just started doing the same thing out of the blue after the android 11 update..
However the 2022 model ships with android 12 so I'm pretty sure Motorola fixed that bug and has nothing to do with this devices issue..
Crazy is all I can say lol
Shawn77371 said:
On the IMEI reports it shows clean under the general blacklist area.
Then under the carrier blacklist check it shows clean.
Also keep in mind that the original device has this issue of not connecting so I bought a parts phone from a different person so I could transfer all it's internals over and the issue still persist.
While it's very possible to get two phones back to back from different people to have the same issue I would think that it's very unlikely that it would happen.
I was reading on Motorola's website forums that with the 2021 model a lot of peoples phones just started doing the same thing out of the blue after the android 11 update..
However the 2022 model ships with android 12 so I'm pretty sure Motorola fixed that bug and has nothing to do with this devices issue..
Crazy is all I can say lol
Click to expand...
Click to collapse
This is one of those times when it is probably something obvious that neither of us would think should have anything to do with the issue or something so subtle and simple that it is being overlooked.
Droidriven said:
This is one of those times when it is probably something obvious that neither of us would think should have anything to do with the issue or something so subtle and simple that it is being overlooked.
Click to expand...
Click to collapse
I agree 100%

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