Replacing the motherboard on the S7 - Samsung Galaxy S7 Questions and Answers

I'm currently trying to replace the motherboard on my galaxy S7, AT&T (SM-G930A). Since I'm taking the entire mobo out, does that at all allow me to put a motherboard from a different cell carrier (ex. verizon, t-mobile, unlocked, etc.) inside it? If not, what's preventing it?

It should not be any problem to do that right? I would just make sure that the new motherboard is the same model as the original.
I've done this type of repairs on galaxy s4 and almost every iPhone except 7 and it was never any problems.
How did it go, did you manage to change motherboard? And is it working?

I haven't replaced it yet because I want to make sure that I can do it in the first place. The thing with the samsung mobo's is that for different carriers there are slightly different models - for example, Factory Unlocked is SM-G930V, T mobile is SM-G930T, etc. I want to be able to use a same motherboard but different variant because I'm not on AT&T so I wouldn't be able to use it as my phone. In your repairs, did you ever notice if you changed out a motherboard for a variant from a different carrier?

Related

[Q] Self upgrade of the Verizon Xoom?

Is it possible to buy the LTE modem myself and install it to make it work?
Anyone knows the brand & model # of the modem?
The reason I asked is because I am in Hong Kong and not able to ship the unit back for upgrade.
Thanks,
J
Dude, that would be risky to try a self Upgrade. If you mess it up, your warranty is toast. Contact Motorola and ask them if there is anything that can be done because you are out of the country.
I think that should be possible if you findma way to obtain the module. check ifixit.com, they have a guide with some images. All you need to do is remove the two screws located near the usb- and power connector, after that you'll be able to slide down the aluminum part of the back cover. you'll find a dummy-mini-pci-card which needs to be swapped with the 4G-module.
I'm not sure on the software-side though, I suppose that flashing a MZ602-rom is enough, but who knows...

replacing cracked screen

hello,
i have here a lumia 1020 froom at&t. it has a cracked screen.
i wanted to ask, if i can just buy an digitizer screen from ebay and replace it, because i know there are some differences between the us at&t model and the international one (as i know its only about the frequencies gsm, lte etc). should there be a problem with a possible other pin assignment for the display connectors ?
second i wanted to ask if i can flash an international debranded windows phone version over the at&t firmware (after the phone has been sim unlocked)
I cracked the screen of my 1020 twice, both times I bought a screen at amazon, different sellers. The first time the screen was perfect 100%, the second time the screen that I received was a bit faulty, I had a gab between the body of the phone and the screen and you could see light coming out from the side of the phone, annoying. eventually the corner of the screen broke again, I 'm not changing it again, the screen for this phone is too expensive and already bought two, my next screen will come with the phone that replaces 1020. maybe 1030 or whatever it is. Just try to get it from a good seller that could relace if it comes faulty.
the same problem. trying to deattach the glass and keep digitizer. if will be successful will publish the guide.
Just buy display assembly from good seller. The rest is simple.
I tried to separate the glass from digitizer and broke the LCD in the process. Later had to buy the whole display assembly.
Only concern was, you get glass for less than a dollar, but display assembly costs 100+ dollars.
todarkness said:
hello,
i have here a lumia 1020 froom at&t. it has a cracked screen.
i wanted to ask, if i can just buy an digitizer screen from ebay and replace it, because i know there are some differences between the us at&t model and the international one (as i know its only about the frequencies gsm, lte etc). should there be a problem with a possible other pin assignment for the display connectors ?
second i wanted to ask if i can flash an international debranded windows phone version over the at&t firmware (after the phone has been sim unlocked)
Click to expand...
Click to collapse
Hello todarkness, if you buy a screen without frame, both at&t and international models are interchangeable, otherwise, you'll have to buy the at&t version if you need the frame as well.
Replacement: http://www.etradesupply.com/nokia-lumia-1020-lcd-screen-and-digitizer-assembly-with-front-cover.html
Tutorial: https://www.youtube.com/watch?v=D9J26DKFIjU
What about flashing with international rom...

Thick lines across my screen when changing brightness

Hello, I have the 935F from the UK, I am currently in China for a few months. When changing the brightness up and down, four lines/bars appear on my screen which then grow larger or smaller based on my brightness setting. A handful of others have experienced the same problem too with the S7 Edge (not the standard).
Samsung said I can take it to a service center or send it to them in the UK and they will repair/replace the screen free of charge, but as I'm currently in China, I don't want to be without a phone for a few weeks. I asked the Samsung service center here and they said the screen is different, please can anyone confirm this is the case? I thought the screen was the same, but the internal radio components (frequencies used) differed slightly? I am happy to pay Samsung China the repair cost as it will be considerably easier than sending it back to the UK etc, but can anyone confirm the edge screen is identical?
nugget123 said:
Hello, I have the 935F from the UK, I am currently in China for a few months. When changing the brightness up and down, four lines/bars appear on my screen which then grow larger or smaller based on my brightness setting. A handful of others have experienced the same problem too with the S7 Edge (not the standard).
Samsung said I can take it to a service center or send it to them in the UK and they will repair/replace the screen free of charge, but as I'm currently in China, I don't want to be without a phone for a few weeks. I asked the Samsung service center here and they said the screen is different, please can anyone confirm this is the case? I thought the screen was the same, but the internal radio components (frequencies used) differed slightly? I am happy to pay Samsung China the repair cost as it will be considerably easier than sending it back to the UK etc, but can anyone confirm the edge screen is identical?
Click to expand...
Click to collapse
It's not just the internal radios: the Chinese version is the only other version of the S7 Edge that uses a Snapdragon 820 other than the US variants. And there are more differences between the SM-G9350/U/A/P/T/V/... (SD) and SM-G935F (Exynos) than we might know, and Samsung certainly understands quite a lot about their own product, so I'd advise you listen. (for example of small differences between the two that impacts other parts of the phone) the SD820 variant lacks a separate DAC and utilizes the 820's internal DAC, while the E8890 version has a Wolfson DAC.
Likely the difference is going to be the chipset (Snapdragon Vs Qualcom) however I cant say for sure if the internals are all in the same places for the S7 Edge Global Varients.
Might be worth posting in the S7 Edge forum to see if they are aware of anything?
Sorry I didn't realize there was an S7 Edge forum, could a moderator move this thread to there?
Good point, there are quite a lot of differences it seems.
Do you know if I bought a phone like the S7 Edge from Hong Kong, is it fully compatible in the UK? Would it be the 935F variant? I can't seem to find what variants are sold around the world and I know like America and China uses different frequencies for LTE, but saying that, I have the 935F and I'm picking up LTE fine in China.

G930W8 mainboard replace

Is it possible replace mainboard G930W8 to G930F? I have bricked G930W8 and living in Europe
G930W8 and G930F are the same motherboard layout (it's written right on the board "G930F/W8") so it will definitely fit. The daughterboards are model-specific, which I believe is due to the antenna configuration. I would stand to be corrected on that. I'm not sure that it's going to cause you any problems if you didn't have any signal/channel issues with the W8 before it became bricked.
There are sellers online selling the G930W8 and G930F motherboards as directly interchangeable, for what that's worth.
So the problem can only be with the antenna? Thanks for reply

Replace Broken Screen | can i SWAP from exynos <==> snapdragon

Hello to forum,
I just broke my screen from my Note 20 Ultra 5G (Snapdragon) Chinese model SM-N9860
The thing is that i am in Europe and we only have international model (Exynos).
My question is this, can i put exynos display to snapdragon? And if so, am i going to have signal? Cause i've heard that the antenna paths are different.
Thank you
I know the C port PCB is likely incapable.
Check by part numbers.
I spoke with Samsung Support while ago. And I thought to replace something, camera glass and front glass and they said there isn't issue to fix US variant in UK. So I think there isn't problem to use front glass from exynos model.
If the part numbers are the same you'll be ok.
Otherwise probably not.
Have u any idea if this part is ok?
Galaxy Note 20 Ultra 5G SM-N986 - White (GH82-23596C) (50027164) for my SM-N9860 ?​
You need to compare the P/Ns between the two variants.
Someone here may have tried it and can say for sure if it's the same variants.
A repair shop experienced in these can probably tell you too.
Otherwise don't bet on it.
Little suggestion.
If you still are within warranty period then don't repair it your self or anyone that is non certified samsung technician.
Doing so will make rest of your warranty invalid, so send it back to store where you bought it or send it to samsung and let them repair it.
In my case, Samsung mexico repair my 986U1, same case, in the country sales exynos but the part is the same, they change the internal parts because the screen not sale separately, only inconvenient is they not replace the batery like with the national devices service included

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