[Q] Red flashing light after screen replacement - Xperia Z5 Premium Q&A, Help & Troubleshooting

Hello there guys! First than anything, thanks for your time in reading this.
This is not the kind of post that "help!! asap! need help NOW!" etc.
I already replaced my wife's phone, but I'm curious what happen to the previews z5 Premium
She dropped the like in a WWF ring. The screen exploded in million pieces. Not just the digitalizer, the image on the lcd was broken too. But responsive some how to the power button and volumen (some parts on the screen shows the image). I turned the phone off, and bought the replace screen online.
I took the phone apart. I did this on a z1 and 3 times on a z2. On those cases I did an neanderthal work. careless. and in all cases works perfectly. This time I read guides and saw like 5 videos, and I did it perfectly. No broken parts, no plastics cracks, nothing, all smooth. I almost proud on what an excellent work I did (btw, some videos shows taking the whole phone appart (I follow them) but I guess its not need to take the mainboard out, and the buttons either, anyway).
I replaced the screen, connected everything, I just not put the back cover, to first test if the phone turn on.
The phone turn on, I see the LCD back light, but no image. After a couple of seconds, the backlight goes off and 5 red lights flash. and then it restart again. (It goes on a loop).
I took the battery off. I did the power+vol+, I use the internal switch to power it off, etc and keep doing the same.
I started on flashmode (it works btw) which is holding vol - a connecting to pc. (screen in this mode is off). I used flashtool and flashed the last oficial rom, first without wiping, second try I wiped ALL.
Still the phone doesn't go on.
Anyone have any idea?
I had the old scren, all braked, I connected it outside to test if the new screen its the problem. But it do the same. just backlight and 5 red blinks
May be there is something that I can still do.
In any case! thank you and have a great day!

Some kind of short is the only thing I can think of.

Hey Code! thanks for your reply. That can be a possibility. When I have more time I will take it aparta and re ensamble it, double checking. But I'm guessing something in the mainboard is broken. May be when I took the mainboard out I bend it too much. I don't know. I will post if I have any progress.

Usually, when the red light flashes and then goes to bootloop, it's a bad kernel, even though I don't really see how it could have messed up here... But I already had my kernel broken for no apparent reason, like the phone reboots itself, and gets stuck in a bootloop with red lights.
I see you changed the Rom, but did you also flash the boot.img? Maybe try another one? Or maybe I'm just really off ^^

Hey @deftoner did you managed to fix it cuz i'm facing the exact same problem as you after screen replacement.

Not yet. When I got the time, I will take it apart and re built it. Just in case that I miss something. I was thinking that may be I bend the motherboard too much when I took it out the first time. Its the only thing that I can think off. If I have any news I will post it here. Please if you can do the same

Related

Screen died?

Last night I was out and during the night I pulled my desire z out of my pocket to find that the screen was dead, the soft touch buttons were still lit up and working but no display. I pulled the battery and tried to reboot and no luck, you can hear it booting and even unlock/receive calls and txts etc once it has booted up just the screen stays blank the whole time so have to do everything on feel.
Essentially does this just mean my screen has a hardware fault? is it worth trying to fix? I assume the only option would be to purchase a replacement screen and dissemble and reassemble it?
(warranty is not worth it as I live in New Zealand and would have to send my phone back to the UK where I bought it from, also I have dropped it quite a few times so probably voided anyway...)
Thanks in advance for any input
Does it never display anything? So not even a flash during boot or something?
Because then it is probably a hardware problem.
Since the soft touch buttons do still work I think there might be a little crack or something in the flat cable that connects the bottom half with the top.
Maybe you could check whether you can see if the cable is broken or not?
The best thing to do then is to look for a replacement and try to fix it yourself or bring it to a shop where they can do it for you.
No it never displays anything, completely dead the whole time. The touch input is still working though as I answered a phone call this morning on it by making the usual gesture just without being able to see anything. Doesnt seem to be anything wrong with the cable itself as far as I can see. Yea might have to get someone to have a look at it.
My phone is acting the same. I dropped my phone in the pond before, but pulled battery out on time and had it in rice for a day. My phone was still working for about two weeks after that incident. I dropped it and had one little crack at the top of the screen and about a week after that it died when I had a water balloon fight with the phone in my pocket. D;
Do any of you know if the replacement lcd screen/digitizer for the Desire Z would work for the G2?
I had the same thing happening to my G2 screen, only it was intermittently working for a little while, then just completely died and wouldn't work. It was doing this crazy flickering thing then the back light wouldn't go on at all. If I held the phone at a certain angle in the sun, I could see that the pixels were indeed working on the display, but there was no backlight to make them normally visible.
So I purchased a replacement screen from ebay and carefully followed the directions on a youtube video for a G2 take apart. Its not a hard task to take apart and get down to the screen itself. It was rather easy. After putting it back together the screen still didn't work! Sounds work, i can also receive calls etc. But the screen still doesn't work!
Is there any way that this could be a software issue?
Oh and PS, I believe the LCD replacement would work for both the desire Z and the G2. They are identical phones after all right? I'd say its a safe bet. The screen I bought was only 35 bucks. Didn't think that was a bad deal.
Another dead screen or something else?
Few days ago my phone fell of the couch onto a rug - no big deal, so far it has survived much worse, but when I picked it up, the colors were all messed up - overly green and red. Tried restarting - no luck. Everything worked fine, except the colors, but then the screen turned of completely. I could hear notifications, phonecalls, but the screen was dead. After some tapping on the screen, it turned on again - with ****ed up colors. Then started flickering and was gone again. Few more times I could turn it on by tapping before it was dead for good.
Figured, after all these drops it survived, maybe the screen connector is a bit loose. I mean, I could sometime get a contact when tapping it, so I dissasambled it completely, secured all the connection, put it all back tougether and fired up - same thing: dead screen, phone working.
Has anyone had such problem before? Is it screen that is dead, or connector or... I have no clue... I would like try to fix it on my own, with some replacement parts I could get on ebay - but, what gave?

Black Screen, phone still works?

Hello XDA members, this time I'm writing to all of you to tell you something that happened to my Optimus G E987 from Claro Argentina, also, to ask you something related to the topic.
I bought this phone about 4-5 months ago, and I have taken really good care of it, without using any film protection or case, it was working perfect and with not a single scratch on it, not even a little hit.
But then, some days ago, I decided to "protect it" a little bit, so I got one of this:
htt-p://i[dot]imgur[dot]com/YtgK1aS[dot]jpg
htt-p://i[dot]imgur.com/la1kI5e[dot]jpg
(Sorry, I'm new to this forum so it won't let me post links)
I used it like.. dunno, 3-4 days. One night, my phone was on 53% battery, to lazy to charge it so I just let it like that. Next day I gave it some use, so it dropped to 33% of battery life, I had to go work so I turned it off. When I finished, I tried to turn it on again, but nothing happened, tried more times and nothing, then I noticed I liiiitle light in the screen, the phone was turned on, but with REALLY low visibility, almost everything black but with a little of sight.
I though it was just a battery problem, so I charged it, but to my surprise, nothing happened, well something did happen, the little bit of sight that I had just went full black with no visibility. I noticed that the touch screen and buttons actually worked, I could "easily" navigate through the phone by just using it as normal, but without seeing (you can do this by just knowing your phone a bit).
And that's the story, basically, after using that case, the phone "casually" stopped working properly, all I got was a functionally phone with a black screen.
I managed to connect it to my pc through wifi and launched Android Screen Cast, to see what was happening on my phone. The glow was at 100% (I tried changing it) and everything seemed normal.
If you don't want to read, here is a TL;DR
>Bought Magnetic* Flip Stand Leather Wallet Case for Optimus G
>Some days after, phone screen stopped working (phone was still normally working, just with a full black screen)
About the Magnetic thing.. is there any possibility that this was the problem? the magnetic thing?
Btw, I sent the phone to tech service because it was still on warranty and they have me a new one, now I'm scared of putting it again in the leather case I bought, I don't want this to happen again.
Something to comment? hope you can give me some advice, thanks in advance!
Also having similar problems as you. Somehow, i am quite sure its the stock rom causing the problem.
Had the very same issue few weeks ago, had to send the phone back to LG ( who replaced the motherboard :/).
I was also on stock rom, had root and unlock bootloader (of course I clean all that **** before sending it back).
For my part, I was unable to go to recovery and download mode was quit impossible to access (may be my finger fault )
BUT! some time if I let the phone off for a moment or spam the power key, the backlight turn back on until I power down the phone, so it's could be a software issue ...
Anyway, an other info, when the backlight was off, if i tried to change backlight level i was getting a error message about overeating or something like that...

[pics][fix] Sleep of Death?

I have the p600, bought at Best Buy a few days after launch. Have it rooted using auto root. It has been running perfectly until today. It started taking a few presses of the power button to turn it on after the screen went to sleep, I thought nothing of it and assumed I was just not pressing the button hard enough.
Then a few hours ago, it just stopped turning on again after the screen went to sleep. If I power it off (long press on power button) it will reboot and the display is on again, and it works fine until it goes back to sleep.
After pressing the power button, the menu and back button light up, and If I hold the tablet in a bright light, I can see the images on the screen. So I know the LCD is working, but for some reason the back light won't turn back on after going to sleep. If it were a bad back light, then obviously it wouldn't work again after rebooting.
I tried a factory wipe - same problem
I did an Odin flash with MK1 stock rom - same problem
I suspect a hardware issue, but Ive been reading about this "sleep of death" that can happen with android devices. Fixes range from installing new kernels to replacing the device.
Anyone experience this or know what is going on?
**UPDATE**
A possible fix for this (and it worked for me) is to take the back cover off, disconnect the battery, and plug it back in again.
I have included pictures of what you are looking for.
When taking the back cover off, I was able to do it with just a credit card. Start at the charge port and carefully get between the casing at the cover, move around the outside, popping the outside clips (look at the photo of this). The inner clips will still be holding after you get all the way around, then simply work out the inner clips 1 at a time. It was a little difficult the first time because I wasn't sure how it was attached, but the second time I took it off, it was pretty straight forward.
When putting the cover back on, follow the same procedure. Start at the charge port, get those clips in, then work your way around the outside, careful not to push to hard on the inner part of the tablet, apply your force at the edges. once the edges are clipped in all the way around, simply press in the inner clips (you will feel them snap in)
I can post more pictures for people who want them. I might even make a short video of the procedure, all in all, its pretty straight forward. It's a relatively easy cover to remove.
Battery Connection
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Battery connector removed (you will see, it is just the white part that comes out, use a small screwdriver or pry tool just behind the wires, and lift up, its cliped on the sides)
These are the internal and external clips, you will see that the "hole" looking ones are the internals, they are in there pretty good, take care when prying them out not to damage the cover or clip mount
Interesting.. I just received my p600 today. I had an occurrence similar to this - I hope there isn't some flaw in them we are uncovering... I'll have to wait a week or two before rooting to see if it occurs again.
dzam72 said:
Interesting.. I just received my p600 today. I had an occurrence similar to this - I hope there isn't some flaw in them we are uncovering... I'll have to wait a week or two before rooting to see if it occurs again.
Click to expand...
Click to collapse
ya, good idea on the root. Im not sure how the warranty bit being tripped is going to play out should I need a replacement given that we don't even have custom kernels or rom's yet.
I am going to downgrade the firmware to MJ4 and cross my fingers. Wish there was a faster way to DL these other than slow ass sammobile lol.
Had the same issue on my 10-day old device during a flight back from the US to the UK which was highly inconvenient.
Anyway, what I noticed was that when opening the magnet cover or turning on from sleep, the tablet actually woke up (touch buttons lit up) but the screen backlight wasn't turning on (if I held it at a certain angle, I could see that the screen was showing the home page but just no backlight).
Another side effect of this was that, even after rebooting and having the screen backlight on, the brightness setting was doing nothing.. I could set it to auto or manual brightness and adjust the slider and it stayed the same brightness regardless. As with others, a factory restore had no effect.
In the end, given that I'm kind of boned for the US warranty living in the UK anyway, I just opened it, disconnected the battery connector, reconnected it and started it up. After that, no problem.. brightness and wake-from-sleep started working again no problem.
mproudfoot said:
Had the same issue on my 10-day old device during a flight back from the US to the UK which was highly inconvenient.
Anyway, what I noticed was that when opening the magnet cover or turning on from sleep, the tablet actually woke up (touch buttons lit up) but the screen backlight wasn't turning on (if I held it at a certain angle, I could see that the screen was showing the home page but just no backlight).
Another side effect of this was that, even after rebooting and having the screen backlight on, the brightness setting was doing nothing.. I could set it to auto or manual brightness and adjust the slider and it stayed the same brightness regardless. As with others, a factory restore had no effect.
In the end, given that I'm kind of boned for the US warranty living in the UK anyway, I just opened it, disconnected the battery connector, reconnected it and started it up. After that, no problem.. brightness and wake-from-sleep started working again no problem.
Click to expand...
Click to collapse
I am using the the bookcover also, wonder if the magnetic cover is somehow screwing it up. Im glad you said you opened it up to DC the battery. That was on my list of things to try! too bad there isn't a way to DC the battery with a USB jig. cross some wires or something.. as a EE, one would think I would know a trick that would accomplish that.. lol.
im downgrading firmware and going to do a full nand-erase with bootloader update, and see what happens
*Just noticed that my brightness slider also has no effect. This must be the indicator that the sleep of death has occurred
*Update*
I removed the back cover, unplugged the battery, plugged it back in and it started working normally again. After playing with it for several minutes to ensure it was working (turning it off and on a few times over and over) I put the rear cover back on. But as soon as I had done that, the problem started again.
I removed the cover again.. unplugged the battery.. but this time, after plugging it back in, the problem remained. After a few more unplug/repluging of the battery and it not working, I decided to unplug the LCD, digitizer, and the backlight ribbon cables. I booted the device without these attached, let it boot fully, then powered it down, removed the battery connector, re-attached the ribbon cables then the battery, booted it again, and the screen was back to normal.
Ill keep playing around with this to see if isolate the problem, but it seems like there is something going on with the connectors, or some sensor/detector/controller getting "software stuck". When the screen is turned off, this sensor/detector/controller is either not getting the right information sent to it, or, it is has gotten stuck in some process it can't resolve (happens a lot in hardware engineering). It can happen when something shorts, and sends the device into a shutdown state (watchdog trips). The rear motherboard has A LOT of flex to it, and I had to push kinda hard on the rear cover to re-attach it. I wonder if when the back of the tablet gets pushed in just the right way, in just the right spot, it causes this screen issue to happen.
Either way, this is pretty unacceptable for a $600 device. The good news is that there is no warrant seal on the rear cover.
After use auto root. did you reinstall stock recovery?.
Serinety said:
*Update*
I removed the back cover, unplugged the battery, plugged it back in and it started working normally again. After playing with it for several minutes to ensure it was working (turning it off and on a few times over and over) I put the rear cover back on. But as soon as I had done that, the problem started again.
I removed the cover again.. unplugged the battery.. but this time, after plugging it back in, the problem remained. After a few more unplug/repluging of the battery and it not working, I decided to unplug the LCD, digitizer, and the backlight ribbon cables. I booted the device without these attached, let it boot fully, then powered it down, removed the battery connector, re-attached the ribbon cables then the battery, booted it again, and the screen was back to normal.
Ill keep playing around with this to see if isolate the problem, but it seems like there is something going on with the connectors, or some sensor/detector/controller getting "software stuck". When the screen is turned off, this sensor/detector/controller is either not getting the right information sent to it, or, it is has gotten stuck in some process it can't resolve (happens a lot in hardware engineering). It can happen when something shorts, and sends the device into a shutdown state (watchdog trips). The rear motherboard has A LOT of flex to it, and I had to push kinda hard on the rear cover to re-attach it. I wonder if when the back of the tablet gets pushed in just the right way, in just the right spot, it causes this screen issue to happen.
Either way, this is pretty unacceptable for a $600 device. The good news is that there is no warrant seal on the rear cover.
Click to expand...
Click to collapse
If you open it again, would you mind taking a few pictures of a disassembly process and the way it looks after removing the back cover?
How difficult is it to remove the back cover? Any plastic damage caused?
malutki said:
If you open it again, would you mind taking a few pictures of a disassembly process and the way it looks after removing the back cover?
Click to expand...
Click to collapse
Already took em That was the first thing I thought of when I was taking it apart. I will try to get them posted soon.
Tablet turned on and off like normal yesterday and today. Not a single forced reboot was required. However, while taking notes today, I noticed a dead zone on the right side of the screen. Touch works fine there(with fingers), but the spen won't work. It just jumps over the area. The affected area is a vertical line from top to bottom.
Since I have not been using the spen lately, I can't be sure if it is a symptom of the sleep of death, or a result of removing the ribbon cables and not seating them properly when I reattached them. I'm going reseat the cables and see what happens.
I just got my Note tonight and have this same issue. I got it at Amazon and it came with both seals broken as others have found. Was surprised it seemed to already be on, when I hit the power button the buttons lit up but no screen. Grabbed a flashlight and could see the backlight wasn't turning on. Tried turning it off and back on, or so I thought, but no dice. I figured I had a bad unit and set up the RMA with Amazon.
I then went and stuck it on the charger and held the power button for a long time, and the charging screen popped up. Turned it on, seemed to be working fine until I hit the power button, and then the backlight wouldn't turn back on again until I rebooted it. I took all of the updates and did another factory reset, same issue.
Now, I also bought a smart cover. After taking the updates but before the reset I tried it, it'd shut off the Note but the backlight still wouldn't turn on when I opened it up. HOWEVER, after the factory reset, I opened and closed it a few times and it worked correctly. I then tried the power button a couple of times and it also worked correctly. For the record, my brightness controls DO work correctly.
At this point I'm not sure what to do. I _really_ want this tablet, and Amazon is out of stuck so I can only return it for a refund. I don't want to do that since I got it on sale and it no longer is.
EDIT: Also, I just tried closing my smart cover and hitting the power button with the cover still closed, and the screen DID turn on. So I'm not sure if that partially throws the theory of the magnet going out of whack out the window or not, since it should turn on even if the cover is closed.
locovaca said:
I just got my Note tonight and have this same issue. I got it at Amazon and it came with both seals broken as others have found. Was surprised it seemed to already be on, when I hit the power button the buttons lit up but no screen. Grabbed a flashlight and could see the backlight wasn't turning on. Tried turning it off and back on, or so I thought, but no dice. I figured I had a bad unit and set up the RMA with Amazon.
I then went and stuck it on the charger and held the power button for a long time, and the charging screen popped up. Turned it on, seemed to be working fine until I hit the power button, and then the backlight wouldn't turn back on again until I rebooted it. I took all of the updates and did another factory reset, same issue.
Now, I also bought a smart cover. After taking the updates but before the reset I tried it, it'd shut off the Note but the backlight still wouldn't turn on when I opened it up. HOWEVER, after the factory reset, I opened and closed it a few times and it worked correctly. I then tried the power button a couple of times and it also worked correctly. For the record, my brightness controls DO work correctly.
At this point I'm not sure what to do. I _really_ want this tablet, and Amazon is out of stuck so I can only return it for a refund. I don't want to do that since I got it on sale and it no longer is.
EDIT: Also, I just tried closing my smart cover and hitting the power button with the cover still closed, and the screen DID turn on. So I'm not sure if that partially throws the theory of the magnet going out of whack out the window or not, since it should turn on even if the cover is closed.
Click to expand...
Click to collapse
I just checked Amazon and they have them in stock. Do you think maybe because so many people are getting replacements over and over they are just recycling them and selling them as "new?" Do you have the link to where people are reporting getting them with both seals broken? Thanks.
notebooko said:
I just checked Amazon and they have them in stock. Do you think maybe because so many people are getting replacements over and over they are just recycling them and selling them as "new?" Do you have the link to where people are reporting getting them with both seals broken? Thanks.
Click to expand...
Click to collapse
Amazon itself doesn't have the 32gb black in stock, only 3rd party vendors.
http://www.amazon.com/Samsung-Galaxy-Note-Edition-Black/dp/B00F3SOHNU
The most recent opened seal thread is here: http://forum.xda-developers.com/showthread.php?t=2533073
Here's an older one: http://forum.xda-developers.com/showthread.php?t=2483916
Hi Serinety:
Thanks for the diassembly picture. I believe you are the first one to show the inside!
If possible, do you mind showing pictures a bit more inside? For instance, I'd like to see where the WiFi and LTE connectors are. (They are both different connectors btw)
Many thanks.
Serinety said:
I have the p600, bought at Best Buy a few days after launch. Have it rooted using auto root. It has been running perfectly until today. It started taking a few presses of the power button to turn it on after the screen went to sleep, I thought nothing of it and assumed I was just not pressing the button hard enough.
Then a few hours ago, it just stopped turning on again after the screen went to sleep. If I power it off (long press on power button) it will reboot and the display is on again, and it works fine until it goes back to sleep.
After pressing the power button, the menu and back button light up, and If I hold the tablet in a bright light, I can see the images on the screen. So I know the LCD is working, but for some reason the back light won't turn back on after going to sleep. If it were a bad back light, then obviously it wouldn't work again after rebooting.
I tried a factory wipe - same problem
I did an Odin flash with MK1 stock rom - same problem
I suspect a hardware issue, but Ive been reading about this "sleep of death" that can happen with android devices. Fixes range from installing new kernels to replacing the device.
Anyone experience this or know what is going on?
**UPDATE**
A possible fix for this (and it worked for me) is to take the back cover off, disconnect the battery, and plug it back in again.
I have included pictures of what you are looking for.
When taking the back cover off, I was able to do it with just a credit card. Start at the charge port and carefully get between the casing at the cover, move around the outside, popping the outside clips (look at the photo of this). The inner clips will still be holding after you get all the way around, then simply work out the inner clips 1 at a time. It was a little difficult the first time because I wasn't sure how it was attached, but the second time I took it off, it was pretty straight forward.
When putting the cover back on, follow the same procedure. Start at the charge port, get those clips in, then work your way around the outside, careful not to push to hard on the inner part of the tablet, apply your force at the edges. once the edges are clipped in all the way around, simply press in the inner clips (you will feel them snap in)
I can post more pictures for people who want them. I might even make a short video of the procedure, all in all, its pretty straight forward. It's a relatively easy cover to remove.
Battery Connection
Battery connector removed (you will see, it is just the white part that comes out, use a small screwdriver or pry tool just behind the wires, and lift up, its cliped on the sides)
These are the internal and external clips, you will see that the "hole" looking ones are the internals, they are in there pretty good, take care when prying them out not to damage the cover or clip mount
Click to expand...
Click to collapse
locovaca said:
I just got my Note tonight and have this same issue. I got it at Amazon and it came with both seals broken as others have found. Was surprised it seemed to already be on, when I hit the power button the buttons lit up but no screen. Grabbed a flashlight and could see the backlight wasn't turning on. Tried turning it off and back on, or so I thought, but no dice. I figured I had a bad unit and set up the RMA with Amazon.
I then went and stuck it on the charger and held the power button for a long time, and the charging screen popped up. Turned it on, seemed to be working fine until I hit the power button, and then the backlight wouldn't turn back on again until I rebooted it. I took all of the updates and did another factory reset, same issue.
Now, I also bought a smart cover. After taking the updates but before the reset I tried it, it'd shut off the Note but the backlight still wouldn't turn on when I opened it up. HOWEVER, after the factory reset, I opened and closed it a few times and it worked correctly. I then tried the power button a couple of times and it also worked correctly. For the record, my brightness controls DO work correctly.
At this point I'm not sure what to do. I _really_ want this tablet, and Amazon is out of stuck so I can only return it for a refund. I don't want to do that since I got it on sale and it no longer is.
EDIT: Also, I just tried closing my smart cover and hitting the power button with the cover still closed, and the screen DID turn on. So I'm not sure if that partially throws the theory of the magnet going out of whack out the window or not, since it should turn on even if the cover is closed.
Click to expand...
Click to collapse
I got mine from BH Photo. It works perfectly and all seals were intact when I opened it.
Thanks, can you help me?
i just drop my p600, all the digitizer is broken now, but its still working, i dont want to tear down it, because it can stop working, so, can you please tell me if the digitizer is atached (glue and heat) to the screen, or is it just a plastic holder as its predecessor note 10.1?...
thanks buddyes, sorry about my english it is not my main lenguage u_u, im trying my best.
Just repaired my daughter 's note 10.1 2014 further hard fall thanks to your battery advice!
Thank you, it works fine
Envoyé depuis mon GT-I9505 avec Tapatalk
Just someone post the images of rear back of Note 10.1 (2014) for both P601 and P600 to see the diff when Disassemble the P601 and P600 for replacement purpose?
(mine is P601 and i think i need replace SIM card holder-it's broken since few times take it in-out).
This thread freaks me out. I hope this doesn't start happening to me/everyone.
Sent from my Nexus 5 using Tapatalk
Taking into account the shock of impact, it is normal to my opinion to have strange behaviour of the device...
Would be better to have full time access to battery in order to make hard reset ... or to have dedicated button for this purpose.
Envoyé de mon SM-P600 en utilisant Tapatalk

[SOLVED] Black Screen Issue

Hi. I am not sure this is the BSOD problem that others have had.
I bought a second hand i747. It came with 4.3. It will work fine for a few minutes when first turned on, then the screen will go dark. The menu and back buttons stay lit, and the touchscreen still works, the LCD just cuts off.
If I hit the power button, it sleeps the phone. When I hit again, the screen will come on, but only for about 5 seconds, then it's black again. Everything works, just black screen.
Is it possible for it to overheat or something? It doesn't feel hot at all, but if I turn it off and leave it for awhile, it will again work for about 2-3 minutes, then only about 5 seconds at a time again.
I swapped batteries, and it's the same. The battery had pink on it. I opened it up, and none of the other stickers showed water exposure, and the board itself was clean.
It has stock 4.3, and is not rooted.
I did go to phone settings and turned off the "darken screen during calls" checkbox.
I am wondering if the proximity sensor heats up and shuts the screen off. Grasping at straws I suppose.
Any idea of how to fix this?
Thanks
Perhaps a bad capacitor in the digitizer/lcd assembly? My TV had an issue with a bad capacitor that would cause the screen to blank out after a few minutes???
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
I'll try swapping boards in it later, and maybe at least narrow down if it's the board or the screen assembly. I have an extra proximity sensor I could swap, but it doesn't seem like it's that to me.
thanks, will post more after the board swap
Update: I switched boards (different carriers), and I could not replicate the problem in either phone. I had hoped that would show that either the board or the LCD assembly was bad, but I didn't learn anything useful either way.
I put the boards back in their respective bodies. It still happens now, but not as often. It also appears to be totally random. I did switch batteries in the problem phone, and it doesn't seem as bad. I will try another battery switch and see if that helps it more.
When the screen goes dark, the menu and back buttons are lit. When it went out last night, I could see that there was still some faint background light that I can't see in the day. I pulled up Youtube and did a video, and when the screen went dark, I could still see movement, but couldn't make anything out. So, the phone is still going in the background.
If I push the power button, it sleeps, then push it again, and it wakes up just fine. Sometimes I have to do that 4 or 5 times for the screen to stay on. Sometimes it goes dark after 10 minutes of use, sometimes a half hour, sometimes just a few.
Any help is appreciated.
Well, right before throwing the phone into the wall, I noticed a partially removed liquid exposure indicator. I pulled the phone apart to check the motherboard.
In the process of taking it apart, I forgot to take out the SD card. In so doing, it pulled the sim/sd card module off the motherboard. Low and behold, there was a very light corrosive glaze in a few spots under the module.
So, I got out the 99% IPA, and a toothbrush, and cleaned the whole entire board. Since then, it seems to be working fine.
I don't know exactly what part getting cleaned fixed it, because I just cleaned the whole board.
Anyways, maybe that'll help someone with inexplicable issues downstream.
Thanks for following up with how you fixed the problem. In retrospect, water damage makes sense.
I dropped a Captivate into an ice chest full of melted water last year. I immediately pulled it out and the phone was mostly okay for a while but then the microphone didn't seem to work so well and occasionally the right third of the screen wouldn't respond to touch until I cycled the screen on and off. The water damage sticker and phone interior showed no signs of water.
I will probably sell the old captivate but with full diclosure about the history. Would have been nice if the seller had done the same for you.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Thanks, I should have thought of it sooner, but it didn't seem to have any signs of water damage otherwise.
I ordered the 99% IPA online, because I couldn't find any locally. It works wonders with previously wet boards. You might be able to bring it back.

[Q] Part of the screen is not responding to touch... help?

So during my holiday my HOX got splashed with a bit of water from a wave. The battery was running on fumes and, when I looked at it, the phone was dead. It did turned on later while in my pocket and I happened to press the power button.
I let it dry on rice and nothing. I made the potential mistake of trying to charge it so it would heat up and it wouldn't charge. I then bought another mobile and, just to try it, I took opened the HOX and hoovered. Nothing.
Miracle happened yesterday when, just for kicks, I tried the charger again. It power up!! Everything seems fine, no visible screen damage, wifi works, everything works just fine but... screen won't respond to touch on the very bottom, say, the capacitive and menu buttons (the ones just above the capacitive ones).
What do you guys think? Is the screen dead there, maybe I didn't put the screen back properly or should I wait as some moister might yet be there?
Cheers!
Kutusov said:
So during my holiday my HOX got splashed with a bit of water from a wave. The battery was running on fumes and, when I looked at it, the phone was dead. It did turned on later while in my pocket and I happened to press the power button.
I let it dry on rice and nothing. I made the potential mistake of trying to charge it so it would heat up and it wouldn't charge. I then bought another mobile and, just to try it, I took opened the HOX and hoovered. Nothing.
Miracle happened yesterday when, just for kicks, I tried the charger again. It power up!! Everything seems fine, no visible screen damage, wifi works, everything works just fine but... screen won't respond to touch on the very bottom, say, the capacitive and menu buttons (the ones just above the capacitive ones).
What do you guys think? Is the screen dead there, maybe I didn't put the screen back properly or should I wait as some moister might yet be there?
Cheers!
Click to expand...
Click to collapse
This is a flashback to me. Same thing happened to me few weeks ago - first 3 bottom buttons stoped working, and now 7 days ago part of touch screen is not working anymore. I am going to replace lcd+digitizer+frame, lucky me nothing else need to be fixed. And IMHO trying to heat closed HTC when water was in it doesn't make a sense as a water will condense (as it is closed) so it would make more damage. Oxidation sucks :/
I do have the SIM slot opened but yeah, that's a tinny opening, not much space for water vapour to escape... it's been a few weeks since I thought it had died though, it's pretty amazing to me that it came back at all. Some tough phones, these...
Anyway, I think I'll try to take the screen out again, I wasn't too careful putting it back in because I saw it wasn't charging or powering up or anything at all.

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