Replacing parts in the G4 (specifically the WiFi module) - G4 Q&A, Help & Troubleshooting

I've seen some tutorials saying the G4 is easily repairable, but I have some specific questions about repairs. The WiFi module on my phone is completely dead, and I want to try to replace it somehow. This guide shows where the module is, and what kind it is. Has anyone attempted a similar repair? Is it even possible? Where did you get the spare parts? Should I just try to get a whole new logic panel from a different G4? Does anyone have tips?
I tried adding links to the guide and the specific chip, but the spam filter blocked me out.
broadcom com/products/wireless-connectivity/wireless-lan/bcm4339
ifixit com/Teardown/LG+G4+Teardown/42705

It's going to be very difficult to get a single broadcom chip. Most of the time they're only sold in big quantities exclusively to corporate bodies or educational institutes. But let's say you got one. I'd urge you to use a BGA station or have it replaced by someone who has experience in using such a device, OR, do it like this guy here. It may show an eMMC replacement but the procedure is exactly the same.
Getting a new mainboard is also not very easy. Not only is it very difficult to find one, most of the time, smartphone logic boards have to be rewritten with the correct IMEI/SN/ESN or whatever. If you're lucky, you'll find a seller that offers such a service for a small fee.
I don't recommend getting a used mainboard in any case unless the seller is a trusted dealer. In such a case, you have to take care of the IMEI and SN stickers on the back of the phone. Make sure you attach them on the corresponding devices.

Related

IMEI Sticker Replacement

I purchased a T-Mobile galaxy s4 with a cracked screen at a great price and am going to repair the device myself. The extent of the damages requires me to change the front housing which contains the IMEI sticker. I was wondering if anyone knew where I would be able to purchase a new IMEI label to place on the new part after the repairs are complete?
Same problem here, I have changed my screen and the sticker was damaged. I hope that someone have the solution.
Do you really need it? I mean it will work perfectly once a new sim is put in. So who cares what the sticker says?
If you need the number for future reference you could just write it on any sticker and slap it in there. I have doubts that it would help for future warranty repair as you certainly won,t have any warranty on the device that has been broken and self repaired.
I understand some people just like to have everything look new. But for all anyone knows you are planning to sell the repaired device as though it was never damaged, which is unethical. Or you are trying to disguise a phone with a bad imei with a sticker showing a good imei, which is downright illegal.
I'm not accusing you of either, by the way. You seem like a nice enough guy. Just trying to demonstrate why any discussion around imei's, imei labeling, or changing imei's is always really touchy subject matter on xda. And even if your intentions are honorable the information you use to accomplish your goal can be used by thieves who would use it to deceive others. As such, xda prefers not to have any discussion of imei related stuff in the forums as it then becomes publicly available to those who would use it improperly. Xda does not want to be a party to that information sharing. And this thread is already in the top 5 Google search results when you search for "imei sticker" but the way, just to demonstrate how easily this information would be accessible to people looking to use it for bad purposes.
Sent from your phone. You should be careful where you leave that thing.
I have no ill intentions, just want everything to look new after my repairs are done. I completely understand the perspective you presented and I didn't even think of that aspect of my inquiry. I guess I'll have to do without it, as it's not a huge deal. Thanks for your input on the matter anyway!
Sent From An Incognegro Galaxy S4
good luck. i don't see you being able to get a new sticker. just as stated if you know the number what's the big deal of not having one

[Q] N7105 Replacement Motherboard?

Howdy all<
First, I swear I've searched high and low for this answer. I've been to the xda threads with guides to disassembly and reassembly and followed the links to OEM part retailers and come up with zilch.
So, I have a bricked GT-N7105 with suspected sudden death syndrome. It acted screwy for a few days with random reboots etc and then, one day, I took it out of my pocket and it was dead. No boot, no charge, no lights, no nothing. I sent it to Samsung who (classic) are claiming liquid damage and want to charge me $588 Australian to fix it. I am unprepared to pay this. I know that the chip should be covered by extended warranty but this is voided by the supposed liquid damage. I will fight them on it but am not optimistic about the outcome.
So, assuming that I'm not giving my money to Samsung or the company that they outsource their repairs to, can anyone point me towards a link for a store selling replacement motherboards for the N7105?
Furthermore, I haven't managed to find specific information on the motherboard model number for the N7105: is it the same as the N7100 or any of the other Note II variants? Anything that can widen my search criteria will be helpful.
Thanks all. Love your work.:good:
Anyone?
aceofdaves said:
Anyone?
Click to expand...
Click to collapse
try ebay?
If your phone has suffered SDS,then only emmc is damaged,not the whole motherboard.You can get it(emmc) replaced from a third party repair shop.
Gud luck.
1st of all, a motherboard is about 200-250$, and you can repair it at a normal smartphone repair shop, screw samsung.
request photos of the "liquid damage"
i'd take this to the court.
When i destroyed the partitions on my old galaxy player 5.0, they said it was corrosion from some sticky liquid lol, and they eventually gave me a replacement (probably because i figured out they were lying)
+1,Its the same old story they tell to everyone...here in india too .So if you are sure that its not damaged by liquid,just stick to your point and be stern in your approach while dealing with these so called 'technicians'...
Gud luck.
Sent from my GT-N7100 using XDA Premium HD app
Wow. Thanks all! That's all really useful information. I now have it back so I think I'm going to try replaceing the emmc. Will update the thread then.
aceofdaves said:
Howdy all<
First, I swear I've searched high and low for this answer. I've been to the xda threads with guides to disassembly and reassembly and followed the links to OEM part retailers and come up with zilch.
So, I have a bricked GT-N7105 with suspected sudden death syndrome. It acted screwy for a few days with random reboots etc and then, one day, I took it out of my pocket and it was dead. No boot, no charge, no lights, no nothing. I sent it to Samsung who (classic) are claiming liquid damage and want to charge me $588 Australian to fix it. I am unprepared to pay this. I know that the chip should be covered by extended warranty but this is voided by the supposed liquid damage. I will fight them on it but am not optimistic about the outcome.
So, assuming that I'm not giving my money to Samsung or the company that they outsource their repairs to, can anyone point me towards a link for a store selling replacement motherboards for the N7105?
Furthermore, I haven't managed to find specific information on the motherboard model number for the N7105: is it the same as the N7100 or any of the other Note II variants? Anything that can widen my search criteria will be helpful.
Thanks all. Love your work.:good:
Click to expand...
Click to collapse
there you go http://www.etradesupply.com/samsung/galaxy-models/samsung-note-ii-lte-n7105.html?limit=all
N7105 is totally different to the N7100 internally so the mainboard will not physically fit onto the chassis if you put the wrong one in ..as the chassis behind the screen which carries the mainboard is totally different ... so get the the correct one if you are going to change the mainboard
nounnouu said:
there you go etradesupply link
Click to expand...
Click to collapse
Thanks for that, mate. This comes up on google. They have no motherboards!
DId you manage to find a replacement motherboard @acesofdaves?

[Q] Working device, dead screen

A friend recently sent me her "retired" Galaxy Note II. She replaced it because at some point the screen stopped turning on altogether, but she still wanted me to see if I can salvage it somehow. I've tried, with no luck, and searches on the topic don't seem to suggest any solutions other than the fact that it may be a hardware issue. While I can accept this possibility, I'm really hoping that it is not the case because at this point I don't think it would be worth investing the time and money to buy the parts, learn how to replace them, and attempt it. If anyone has any ideas I'd be very grateful. Here are the symptoms:
The display NEVER turns on. It is in a constant state of pitch black.
The sounds are working fine. When I get an email, for example, it notifies me.
The hardware button works
The software buttons do not work
Upon connecting the device to a monitor, keyboard and mouse, the monitor works, however the keyboard and mouse do not. (I use the same monitor, keyboard and mouse with my Galaxy S4 and they all work fine.)
Touch interaction with the screen is working properly. Using the monitor, I am able to use the device, but it is very tricky, as it is simply a matter of trial and error. I tap on a black screen and have to look on the monitor to see if I hit my target.
The device is on the stock TouchWiz that came with it, and is not rooted. Since I am pretty sure that doing any mods without a working display would be more difficult than I could tolerate, I opted to take an OTA instead, despite the fact that it may make rooting and flashing ROM's impossible in the future. I hope I didn't screw myself by doing that but I had to make an executive decision. Here is what I've tried so far:
Factory reset
Update to the latest software (Android 4.3)
Pulled battery, held power button for 10 seconds while battery was out, replaced battery and powered device on.
I'd greatly appreciate any suggestions. Ideally, here is what I'd like to happen: get the display to turn on and restore functionality to the software buttons. This may not be possible without replacing some hardware components, which as I mentioned is not an option, but if it is I'd really like to give it a shot. Thanks in advance for any suggestions.
My initial guess would be a digitizer failure...
A phone drop or water damage can easily render a phone dead...
You have the option of replacing the screen and digitizer at a cost of about $225.00 for the needed parts...but it's still no guarantee that the fix would be 100% successful...
My honest opinion is this...
Given the unknown history of the device...you are taking an expensive chance in attempting a repair...
And given the age of the device....the repair if performed by a qualified repair service would push the cost very near to the overall value of the device...
For the same dollars spent...you can obtain any number of working devices and save yourself the hassle...and the unknowns associated with a repair that will likely work...but again may not...
You are of course free to attempt the repair...but....
The skill level needed to perform a "proper" repair of the device is high...and you would need to study up on the process extensively before cracking open that case...
If I were in your situation...the choice would be to sell the device for parts....and put that cash back into a working device...
Others will chime in I'm sure with their recommendations....but I would choose to move on...g
Sent from my NOTE 2.750...
Courtesy of our amazing developers...
gregsarg said:
My initial guess would be a digitizer failure...
A phone drop or water damage can easily render a phone dead...
You have the option of replacing the screen and digitizer at a cost of about $225.00 for the needed parts...but it's still no guarantee that the fix would be 100% successful...
My honest opinion is this...
Given the unknown history of the device...you are taking an expensive chance in attempting a repair...
And given the age of the device....the repair if performed by a qualified repair service would push the cost very near to the overall value of the device...
For the same dollars spent...you can obtain any number of working devices and save yourself the hassle...and the unknowns associated with a repair that will likely work...but again may not...
You are of course free to attempt the repair...but....
The skill level needed to perform a "proper" repair of the device is high...and you would need to study up on the process extensively before cracking open that case...
If I were in your situation...the choice would be to sell the device for parts....and put that cash back into a working device...
Others will chime in I'm sure with their recommendations....but I would choose to move on...g
Sent from my NOTE 2.750...
Courtesy of our amazing developers...
Click to expand...
Click to collapse
Thanks for the reply, and sorry I didn't see it sooner (I always forget to subscribe to threads). I figured this was probably not a fixable problem (at least not easily/economically fixable). But I wanted to see if there were any quick fixes I could try, and it sounds like there aren't. With that said, if anyone does want it for parts I'd let it go for a reasonable price (considering the damage and lack of functionality) through Swappa. (Sorry if I'm not supposed to make these kinds of offers here, if that is the case I'll gladly remove it.)

Mysterious i9190

Hello everyone! This is my first thread and I know it's the right site to ask this. (sorry for my english)
I bought this "suspicious" i9190 in Budapest 2 years ago. Since then it has been impossible to use it regulary.
Constant rebooting and freezes are part of its daily routine. As well as stopped apps and processes messages in a ridiculous way.
I have tried millions of ROMs, officials and customs, all kind of wipes and restores. I have even tried the eMMC brickbug apps looking for damaged chips or internal memory: Nothing, the phone is perfectly fine.
But here are some facts that may be relevant to find the problem:
- The phone came with the IMEI number scrached in the back of the battery.
- I've been using the phone for hours and hours perfectly fine as long as no update is performed and the Sync option is off.
- Doing the above I have even downloaded and used some little apps with no problems.
- When the major apps are installed, like Facebook and Instagram the phone begins to die, popping more and more "stoppped working" errors.
- The processes that fail the most are the google type but, in general, every single existing process has failed in this 2 years.
- I have noticed that when you start the phone for the first time after a wipe or a new ROM, it is better to create a new google account than using an existing one because the existing one, I think, will start updating everything while the new one will not. Anyway, using a new google account collapses the phone sooner or later.
Sorry for the long post, fellas. But I wanted to give you all the possible info I have about this phone.
Hoping for you can help me fix this issue... Have a good day.
Galaxy S4 mini GT-I9190
I'd guess at a hardware issue in the radio and related circuitry as you seem to get the issues when apps that send/receive data frequently are in use. Though it could be anything. You probably need to get it checked by an authorised Samsung repair centre ......... if your phone is not too "suspicious!"
IronRoo said:
I'd guess at a hardware issue in the radio and related circuitry as you seem to get the issues when apps that send/receive data frequently are in use. Though it could be anything. You probably need to get it checked by an authorised Samsung repair centre ......... if your phone is not too "suspicious!"
Click to expand...
Click to collapse
Thanks for your reply! Do you have an idea why they scratched the IMEI number? Maybe that could take me to where the exact problem is. Here is a photo of the back
http :// imgur. com/Sa0ptSm
Sorry for the link, my account still cannot post outside links
I was going to say they scratched the IMEI number probably because it was stolen so that it could not be tracked, but it is quite easy to see the number so that is probably not the reason. One place I used to work at the test department used to scratch the bar codes on faulty PCB's so that they cannot be scanned back into the system by mistake (if the fault tag comes off, etc) as that computer system did not prevent scrapped boards from being re-entered. So I would guess this may be the case with your phone, but of course we can't know for certain! But based on this and all tests of different ROMs etc you did I suspect it is quite likely the explanation.
What I would do is look for the same model that has a cracked screen on ebay etc so it's cheap to buy then swap the PCB's from the cracked phone to your good screen (swap everything to prevent the possibility of the boards not working due to different revision numbers, as has been reported when replacing the power boards on our phone). You can also buy a repair kit for a few dollars on ebay with screwdrivers, pry tool etc
http://www.ebay.com/itm/10-In1-Repa...et-for-Mobile-Phone-iPhone-6-5s-/281869038536
If the PCB on your phone was scratched to show it was faulty then taking to a repair shop is probably a waste of money, unless then run an assessment for free before they repair it.
Hope you can fix it for a few dollars!
not sure if this helps but that I actually managed read off the IMEI code correctly and it turns out its a turkish registered phone, I can PM you IMEI code if you want, also its not reported stolen (but i am guessing its most likely is), anyways thats all I was here to say, good luck.

Question Is there model compatibility for the inner screen replacement?

Hello guys
I sent my phone to the official Samsung Repair center to replace its bricked inner screen and after few days they canceled the repairing process & replied that they don't have compatible screen replacement for my exact model (f926u/USA version). The repairing center is in egypt.
I suspect that any screen will work on any model
Can anyone confirm if there is actually a model compatibility based on location for the inner screen replacement or not?
In simple words, is the "F926B (EGY) foldable screen replacement" going to work on "F926U (USA)" phone ?
Thanks
I suspect so. But, what are you trying to prove? Samsung outside of the US won't touch it becuase of this regional model number difference. No matter what you say.
Unless you plan to change it yourself.
I believe you can use any Fold 3 display regardless of country of origin to replace your damage Fold 3's inner display
m_w_clarke said:
I suspect so. But, what are you trying to prove? Samsung outside of the US won't touch it becuase of this regional model number difference. No matter what you say.
Unless you plan to change it yourself.
Click to expand...
Click to collapse
Actually the problem is that the assigned engineer is refusing to repair it based on "belief/suspicion" too without actual trial or previous experience. He simply don't want to risk trying to replace a "local screen" on a "USA version". I tried asking them why it will not be compatible, without any solid answer. I even asked them direct questions like "is the socket different between the models", "is there shape difference", "it there different screen power consumption between different models" But I failed to convince them that it should work on any model.
I would not hesitate to attempt replacing it myself, but they don't "SELL" replacement parts & there is no other way to get it from elsewhere.
That is why I am asking here since someone might have the proper experience to confirm it
antonesamy said:
Actually the problem is that the assigned engineer is refusing to repair it based on "belief/suspicion" too without actual trial or previous experience. He simply don't want to risk trying to replace a "local screen" on a "USA version". I tried asking them why it will not be compatible, without any solid answer. I even asked them direct questions like "is the socket different between the models", "is there shape difference", "it there different screen power consumption between different models" But I failed to convince them that it should work on any model.
I would not hesitate to attempt replacing it myself, but they don't "SELL" replacement parts & there is no other way to get it from elsewhere.
That is why I am asking here since someone might have the proper experience to confirm it
Click to expand...
Click to collapse
Ebay in the UK list branded new replacement screens. They are identified as compatible with F926 so cover all regions.
Not cheap though.
antonesamy said:
Actually the problem is that the assigned engineer is refusing to repair it based on "belief/suspicion" too without actual trial or previous experience. He simply don't want to risk trying to replace a "local screen" on a "USA version". I tried asking them why it will not be compatible, without any solid answer. I even asked them direct questions like "is the socket different between the models", "is there shape difference", "it there different screen power consumption between different models" But I failed to convince them that it should work on any model.
I would not hesitate to attempt replacing it myself, but they don't "SELL" replacement parts & there is no other way to get it from elsewhere.
That is why I am asking here since someone might have the proper experience to confirm it
Click to expand...
Click to collapse
It is not that easy to replace the display on a foldable device. The guy was probably afraid that he would do a crappy install job and need to get you another replacement.
After refusing to receive back the phone without it being fixed and making some complaints about it to their call center, they ended up replacing the screen with the local model's & it worked perfectly as I expected.
antonesamy said:
After refusing to receive back the phone without it being fixed and making some complaints about it to their call center, they ended up replacing the screen with the local model's & it worked perfectly as I expected.
Click to expand...
Click to collapse
I am glad that you managed to get your phone repaired. As it is common knowledge that all Fold 3 use more or less the same parts. With the only exception that the US models are designed to operate on the US telecom bands, which are different from those use in other international models

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