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What do repair companies look for to see if warranty is void on phones?

I have a HTC one X, got the black screen of death. I assumed it was a loose connection as the phone is sometimes dropped. I found a forum online mentioning that its the motherboard thats faulty.
I had the phone fixed by HTC after the LED screen was shattered, this cost me around 140 quid. They sent me a refurbished phone, I noticed the screen flickered under certain colours but assumed it was a driver issue. I updated the phone and found 2 updates and seemed fine after that.
Then few days back I put my phone down for couple hrs and come back to it to find the screen is black. Apparently is the video driver shorting or something.
HTC basically gave me faulty phone, thats how i see it, just wondering if I was to send it off what do they look for to see if the case has been opened. Hopefully I can seal it back and they might not notice?
I wanted to fix it myself initially, because I have data on my phone thats not backed up.
Also is the motherboard replacement under warranty or?

Hello.
If you open the phone, i would assume they can see its been opened before. This can be done in many ways. Some screws show signs of having been removed, and scratches on the top of the screws also indicates this.. Then there are the "warrenty if void" stickers across places you need to breach.
Do you plan on opening up the phone? From what you write you have not yet opened the (faulty) phone you got from them, as a replacement? If they gave you a faulty phone, they did not fix the issue with it (you still have issues), and then i believe it should be straight forward to return it. Simply telling them what you write here (got it, noticed wierd stuff, updated it and then it seemed fine, but now its dead). The phone never REALLY worked, after you got it back (refurbished = phone returned to HTC that they send out to other customers as "NEW" while its in fact "CLEANED AND AS-GOOD-AS-NEW" - right?)
My advice would be to NOT OPEN the phone, start by having them replace it. If THAT fails, you can resort to opening it yourself.
Kind Regards
TwinAdk

The problem was I was kinda impatient, and assumed it was a loose connection. Also I have data on the phone and was convinced I could fix it myself (have done other phones). I know when you send the phone off they get wiped before any work is done on them.
I have opened it, there was one screw at the top of the phone with a void print on it. I didn't scuff the screw and was put back in the exact same place.
There was no void stickers or tags to move, the only thing was the battery was stuck down to the base of the phone. It's now loose, i was hoping if i just stick that back and send it off they won't notice anything. There's no marks inside or outside of the phone, look new still.

AW: What do repair companies look for to see if warranty is void on phones?
Well I think there is no way to get a new phone, because you bought a refurbished phone. There is a warranty on refurbished phones, but I'm pretty sure that its nearly impossible to proof that it was their fault or already damaged when you got it.
Sent from my HTC One X using xda app-developers app

I bought the phone brand new from a phone company (in store), since then I've had the phone fixed 3 times. Twice was my fault, but the other fault was the touch screen buttons on the bottom of the phone. They were no longer responsive.
I basically shattered the LED screen, sent it off to HTC, paid 140 quid for repair and sent me this crappy refurbished phone back. This one had the flickering issues and eventually fried the motherboard. Something about shorting the video driver i read in another xda thread.

Blue screen after serious slow down

In case anyone else suffers the same symptoms - a couple of weeks ago, my G3 started running really slowly (and possibly a bit hotter).
Booting from cold seemed to take a long time and the ui starred freezing temporarily on a regular basis.
I was waiting for an ota marshmallow update and hoped that would fix whatever was making it go slow.
I was wrong.
The other night, I was using it and the screen went bright blue and the phone then started boot looping. Sometimes it only got as far as the LG logo and other times it for all the way to the lock screen (on a couple of occasions I could get to the desktop and use the phone 'normally'). Every time it ended up blue screening and then rebooting.
Ultimately, it was dead and despite managing a full wipe, nothing fixed it.
As a phone, when it worked it was ok but cracking screen, poor call quality (only realised that when I got a different phone) and general slow downs (possibly related to overheating (and I could only infrequently increase screen brightness to full because of the warning about overheating) means that I think this phone has been fair rather than excellent.

Its motherboard problem only way to fix it is replace it with new one
Sent from my LG-D855 using Tapatalk

That's what I thought. Phone is well over a year old, so just got a different one.
Good feedback for anyone who has similar symptoms.

I have the same problem, went to the LG service center in my country
and yes they said that I had to replace the motherboard, because the IC power is broken
the cost is around $160, 1/3 the phone price when I bought it mid 2014
I have only used my phone for only 1.5 years and very disappointed with the quality of G3 phone

same **** happened to me, they replaced the motherboard, luckily it was still under warranty.

Don't update its motherboard problem
Same here blue screen came and phone is dead. Gone to lg service center and they told to replace the motherboard yesterday.
The whole phone now only cost 1000AED and they are telling me that motherboard replacement is gonna cost me 950AED .what the heck, better to buy a new phone. Atleast i will get one yeAr warranty new phone for same cost hehe...
The updation of lg g3 software is the main reason for this, so dont update the phone to new version of android pls.

Sorry to unbury such an older thread.
I just got a new (sic) LG G3 D855. A few minutes after the official LG updates were installed, the screen began flickering, with intermediate blue screens, and consecutive reboots. After a BSOD the screen went dark, and the phone seemd to be powered off. I am not sure about this, but I could not power it on again for approx. 20 minutes. Then it was starting again, but I feel very uncomfortable about it and plan to ask for a replacement, since I have full warranty.
Before I return it:
How to I find out the manufacturing year of the motherboard and/or if there is a newer revision or something? Is it printed on the motherboard or readable via an app (e.g. CPU-Z or similar - if I can start it at all)?
Any help in this regard is very much appreciated. Thank you.
Wishing you all a great year 2020!

LG G4 (TMO H811) just up and died

So yesterday morning, I was going to put my phone on my wireless charging pad...nothing new in the mornings. I set it down, the notification led on the pad came on and the LED light on the phone came on. Within two seconds or so, the light on the pad started alternating green/red and the phone LED just went off. The phone instantly powered off.
I was not able to power it back on, full reset the device, nothing. A new battery didn't fix it, unit was not seen by my computer....it's dead Jim.
I talked to LG and they said it was a bootloop issue with the V1.0 hardware. I told the lady that it was not bootlooping...it would not power on at all...period...zilch...nada...nein. She said it must be a different issue and that since it isn't bootlooping, I must have gotten it wet (both the phone and battery moisture sensors are solid white) and that it fried the internal circuitry. Awesome troubleshooting there LG (morons).
I called TMO, they are exchanging it for the $20 replacement fee. All is well in the world I guess. I have seen and read a lot about this issue and figured I was just one of the lucky ones that didn't have a bootloop issue. Something bit me though.

I have 2 lg g4 h818p ...one each for my wife and I.
Both of them had the motherboard conk out and replaced within the first 6 months.
They just went dead (at different times obviously ) , glad the sets were under warranty.
Hope the replaced motherboards don't have the same issue down the road

bendsley said:
I talked to LG and they said it was a bootloop issue with the V1.0 hardware. I told the lady that it was not bootlooping...it would not power on at all...period...zilch...nada...nein. She said it must be a different issue and that since it isn't bootlooping
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I've seen a few like this. Emphasis on few.
No boot loop so does not technically qualify as bootloop but otherwise dead and unrecoverable.
That too with no fiddling as you can't fiddle around at all with MM.
Like its bricked but you did not brick it.
Something bit me though.
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Your backup routine will be more regular ?

Weird Screen Behavior and now totally Unusable, Need HELP!!

Hello Friends,
Three month ago my nexus 5x touch screen started to work awkwardly, sometimes its perfect and sometimes it doesn't work at all until number of locking and unlocking the phone it would work again, until yesterday the screen suddenly rotated upside down!! and then purple flashes then nothing at all, not even google logo just white or purple screen.
So I want to make sure its a screen replacement issue and not a motherboard issue, and where can I buy an affordable one that ships internationally.
thank you guys in advance.
P.S: screen used to work perfectly in recovery before the purple thing.
And If it is as I expect a Hardware issue. I'm out of warranty or a repair point where I live, Do you think buying a new screen frame will fix it for sure or it might be another hardware failure?

Anybody??!!

Did your phone water damaged? I have the same issue but some water was poured on my phone 2 months ago. Now I am waiting for my replacement screen.

Question Front touch screen on my Fold 3 not working?

Hello, two days ago I notice that occasionally my front screen touch screen stopped working. It starts to work for a while but then stopped for good. I restart the phone and start to work again for a few hours and now stopped again. I hard reset it but no luck. The screen works, but the touch function is not available. I have had it for almost 9 months and it was perfect till this moment. I have the August update from Samsung and I think this causes the problem-software problem maybe?

NikolaKeranov said:
Hello, two days ago I notice that occasionally my front screen touch screen stopped working. It starts to work for a while but then stopped for good. I restart the phone and start to work again for a few hours and now stopped again. I hard reset it but no luck. The screen works, but the touch function is not available. I have had it for almost 9 months and it was perfect till this moment. I have the August update from Samsung and I think this causes the problem-software problem maybe?
Click to expand...
Click to collapse
Try running diagnostics in settings->device care to test it

I can only do diagnostic when the phone is open. There is no problem with the touch screen there,but when I close it the touch screen does not work

Not trying to scare you, but exactly the same happened to me like 2 weeks ago. Screen was still showing everything crystal clear, but touch functionality was not given anymore.
Went to Samsung Repair Shop (Germany) and they told me would need to drop it off there for repair. They ordered front screen, in the end repair person found out that some electric-mechanical components had to be fixed. In addition to front screen they even replaced the inner screen and both batteries!
Fortunately everything within warranty, otherwise would have cost me more than 700€.
Best thing would be, go to Repair Shop near you and let them check the device. Crossed fingers that it maybe is not as bad as with my Fold 3.

psch92 said:
Not trying to scare you, but exactly the same happened to me like 2 weeks ago. Screen was still showing everything crystal clear, but touch functionality was not given anymore.
Went to Samsung Repair Shop (Germany) and they told me would need to drop it off there for repair. They ordered front screen, in the end repair person found out that some electric-mechanical components had to be fixed. In addition to front screen they even replaced the inner screen and both batteries!
Fortunately everything within warranty, otherwise would have cost me more than 700€.
Best thing would be, go to Repair Shop near you and let them check the device. Crossed fingers that it maybe is not as bad as with my Fold 3.
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Click to collapse
Thank you for your answer. I spoke with my friend who has a repair shop and we thinks that the front screen is bad. Lucky that I have 12 months warranty left. Tomorrow I'm sending it back on warranty and to see what the retailer will tell

Hi there,
I had already faced this problem, then I sent my in Fold 3 service center.