Develop Bugs

[Q] DHD Display flickering; How to repair?

Hello Forum,
seems that my DHD has an irreparable error.
But i've still a little hope that maybe someone of you guys out there can point me into the right direction to repair the phone again.
What happened:
on December, 20. for no apparent reason the Display started flickering approximately 2 cm from the top.
The upper Part (the first 2 cm from the top of Display) was showing the normal Picture, on the lower Part the Picture was flickering at irregular time intervals, but the touch gestures were still working without any Problems.
Setup at that Time:
- Latest 4ext Touch Recovery
- Latest MIUI.us Rom by bliind
- Custom DPI set to '190' (with ROM Toolbox)
- Max CPU Speed set to 1200 Mhz (with Set CPU)
(Had this setup working fine without any issues for approx. last 2 Months...)
Last change i did before the error occured: Set Custom Boot Animation with Rom Toolbox
The Flickering started not immediatly after setting the new boot Animation but i think 2 days and some reboots later...
Actions that i've already tried to solve the Problem:
1. Shut down the Phone, pull out the Battery, wait some Minutes, reboot the phone.
-> The flickering was gone and the Display looked normal after reboot.
2. After some time I took the Phone out of my pocket and the flickering was there again like before.
Tried to set DPI back to original value '240'
reboot the Phone
-> The Flickering still was there and it seemed to me that the responsiveness of the touch was slightly slower than normal.
3. Reboot into Recovery
Nandroid Backup all Partitions to SD-Card
wipe all partitions except SD-Card
new, totally clean flash of latest MIUI.us Rom by bliind
Reboot the phone
-> The flickering was gone; responsiveness of the screen normal as it was always before.
4. restore all apps; put the phone on the charger over night. everything worked fine again.
on the next Morning this strange flickering was there again; the Touchscreen was very slow responsive in the flickering area
Managed once more to reboot into recovery, but the flickering was now even in the Recovery and on the boot screen.
-> The Touch got more and more unresponsive.
Could no more start a new ROM flash out of Recovery.
5. Tried to access the phone via aahk tool and restored last stock ROM
-> After Reboot the DHD vibrates (like it usually does for startup)
the screen shows a bunch of black and white Stripes that chnge their Color when the Boot Animation should show up,
and later again when the lockscreen should appear.
It makes the boot jingle and i can send Commands via adb.
but Touch commands doesnt work, (tried to put in the Pin blind, but it shows no reaction)
Stupid, but I can't change it: my Warranty and the extra Insurance that i purchased for the DHD ended just 2 weeks before on 6. December.
6. Disassembled the whole phone with Help of you tube disassembling Guide, carefully cleaned all contacts and assembled it again.
-> nothing changed; same behavior like before disassembling.
What can I do? Any ideas except of small rasping and stirring into the soup? :crying:
Can it be only the display? Maybe the Graphic Chip?
Any other ideas?
thank you for reading this all and i appreciate any suggestion that might give my DHD a new spirit of life
Greetings from Cologne

I know it's not what you want to hear, but that sounds like a graphics or display hardware problem...

bananagranola said:
I know it's not what you want to hear, but that sounds like a graphics or display hardware problem...
Click to expand...
Click to collapse
Thanks for your reply!
That was the same what I thougt after disassembling and cleaning with no result.
Cause it seems to me that the Display is still working, but the Signal that's coming in is broken.
I alsready supposed that the Graphic engine is broken.
Just had a little Hope that someone might had the same Problem and got it solved,
before I start practice for mobile phone throwing competition...

i suggest another ROM JB used to cause my DHD flickering (earliear versions)

My DHD was with same problem 1 year a go, and that usually happen when i played games like Angrybirds or Asphalt, or when the device temperature was high.
I was worry at that time, thinking that the device was gone.
Take the same solutions that you had (except disassemble the phone) but they're only temporary.
By that time i decide root the device and install a new rom, (nothing to loose had i think) and Revolution HD was my choice.
After that my DHD didn't flick any more.
I didn't ever know what was the origin of that flickering but for me, that was the big solution.
I'm using Viper Venom 1.2.3 for now, and still with no flickering insues.
So, my advice for you is... give a try to other rom's and kernels, maybe you resolve your insue has i did.
Good luck with that.
Sent from my HTC Desire HD using xda app-developers app

Thanks for you Answers guys,
the Problem i have is, that my DHD does show only sripes even if I try to boot into Recovery, I can't see anything and am not able to start a flash process...
cause i have installed 4ext touch recovery i need the screen to wipe and flash a new ROM.
But i will try to flash an CWM - Recovery through ADB and then to start the flash Process blind by tapping the buttons...
let's see what will happen. There's nothing to loose...
For now, cause I was sitting without a mobile phone at all, I've ordered a cheep one from Amazon... - Huawei U8510 (Ideos X3) -
And oh WONDER!!!: I've got a fully functioning phone with CyanogenMod 7.2 and all the stuff i use my phone for is working without any Probs..
And the whole thing has 2 years of warranty at a cost of € 80,-
only the Display for my HTC would cost € 40,-
so I'm thinking of selling the broken phone on ebay and let anyone try to repair it who is able to....
but I will give it a try to flash another ROM.
Already downloaded the JellyTime R30...

Hello unbeteiligter,
seems that my DHD has nearly the same issues, but with some extra problems.
It seems to be broken since today morning. I wiped the phone and restored the backup I made the afternoon before, and then the first vertical stripes occured. I wiped it and flashed the same rom (CodefireX 4.2.1) again. Same issues. Now I tryed to flash a GingerBread Strock Rom. Even the same issues, and even more shocking is that this problem also occurs in the bootloader, recovery, splashscreen and bootanimation.
Stupid situation, today my Warranty ended.
What can I do? Previously I tougth this is a software problem, but now I think it might be a hardware issue.
Thanks in advance!

daniel_DHD said:
Hello unbeteiligter,
seems that my DHD has nearly the same issues, but with some extra problems.
[...] and even more shocking is that this problem also occurs in the bootloader, recovery, splashscreen and bootanimation.
Click to expand...
Click to collapse
Seems to be the same like my DHD. But for me it ended up 2 Weeks after end of Warranty!
daniel_DHD said:
Stupid situation, today my Warranty ended.
Click to expand...
Click to collapse
The T-Mobile Customer Support told me, that they would have accepted the case as Warranty, if my DHD had ended up during the first week after End of Warranty. Don't know where you bought yours, but maybe there's a small chance for you to get Warranty Support through their obligingness.
If I were you I would try this...
daniel_DHD said:
What can I do? Previously I tougth this is a software problem, but now I think it might be a hardware issue.
Click to expand...
Click to collapse
If your dealer don't accept your Warranty Call, I can't give you much Hope... Sorry for you...
... would imagine you should look for a new phone...
That's what I did....

Similar problem
I have also got a similar problem. Had my phone for two years and have also just hit the same problem. Flashed a new ROM, everything was working fine, then all of a sudden top half of the screen is displayed correctly, the bottom half is always flickering. This occurs in the bootloader as well. Anyone would think that HTC decided to make sure the phone only works for two years and a few weeks after the warranty expires to make sure it experiences problems.

[Q] modded/rooted One X screen issues: hardware related?

So, recently my One X (EU version, endeavoru) begin showing some problems, as outlined below. It was the newest stable CM (10.3) and a somewhat older version of CWRM. After the problems showed, I managed to upgrade to the latest CWRM and CM. Here's the problem:
- When I tried to unlock my phone, the screen stayed black, so I reset the phone.
- When it started up, the HTC logo looked fine, but the CM logo was shifted down and banded: the top of the circle was visible on the bottom of the screen and the bottom of the circle on top of the screen. After that logo the screen turned black.
- It DID boot though, as I could feel the haptic feedback when trying to unlock, and I could hear the sounds of making a screenshot (power+vol down).
- After some resetting etc I finally got an image of the screen again, and saw that I moved some widgets around, so the touch screen def. works when the screen was black.
- I wanted to make sure it was a hardware problem, so I did a total wipe (factory/dalvik) and flashed a new recovery. This worked, but a few times when working in recovery the image froze. I'm not sure if the recovery crashed and did not respond to input, or that the screen just froze, as CWRM only has visual feedback.
- I managed to install the latest CM, tried it, it worked, and then the screen showed some green lines, and a slight shift upwards (the top rows of the status bar showed at the bottom), and I couldn't do anything anymore as far as I could tell.
- The bootloader also showed some problems: the letters were enlarged and overlapped while the image was also smeared across the screen.
Now, basically my question is: can I be sure this is a hardware problem? HTC will fix it if that's the case, but otherwise I will have to be a bunch of money for nothing, because then they will pin the problem on the custom software/firmware/recovery installed. However, I don't think any of the firm/software can actually influence the bootloader, am I right? So if there are problems with the bootloader, it cannot be the case that something I installed on the phone causes the problem.

i think what u have there is Screen Flickering ,, and it's due to a hardware problem ,,someone had the same problem and he had to replace the screen and the motherboard !!!
again am not sure !!

hasan.nj said:
i think what u have there is Screen Flickering ,, and it's due to a hardware problem ,,someone had the same problem and he had to replace the screen and the motherboard !!!
again am not sure !!
Click to expand...
Click to collapse
Thanks! I searched for one x screen flicker and found a video that showcased my problem perfectly:
youtube.com/watch?v=BfnwMFtD2_A
One of the comments said that if they pressed the screen just below the HTC logo it worked again (temporary), and I could reproduce this on my phone. Now I have no doubt at all it's a hardware issue, and I will contact HTC for repairs!

[Q] Phone stuck in screensaver mode

Hi!
I brought my Xperia Play phone USED two years ago and I've never had any problems with it.
However, recently, the phone has started to freeze itself in "screensaver" mode (Where the screen goes black after 15 seconds and locks the phone), but the screen won't light up no matter which button I press. I've had to restart the phone every time this happens.
It's been behaving strange at start up as well, as it sometimes take 20 minutes just for it to turn on, while on other occasions, it won't turn on at all!
Is this problem caused by the battery, or is it the hardware?

Is it with stock firmware?

Vortelf said:
Is it with stock firmware?
Click to expand...
Click to collapse
Yes.
I've never modded it or installed custom firmware/apps.

Have you tried factory resetting it?

Vortelf said:
Have you tried factory resetting it?
Click to expand...
Click to collapse
Yes, but it didn't fix it. The problem still occurs.

tldr: Black screen, no display, everything works "under" (I can answer the phone etc). Not a flex cable problem because occurs randomly, regardless of the slider being open or closed. The problem also occurs during boot up, so rather not a software problem.
I think I have something similiar. Everything was fine until a few days ago the screen didn't want to unlock..or at least I thought it was that.
Basically the phone sometimes works OK but sometimes if I turn off (lock) the screen, it won't go back. To be precise, the phone works and if someone calls me I can pick it up moving the finger where the slider should be, it's just the display doesn't turn on. Same goes for booting, bootloader logo etc, so IMO it's not a software problem.
Strange thing is that it just randomly pops back, sometimes when I move the gamepad slider, sometimes when I put in a jack cable or if I hard reset the phone (remove battery). I've had problems with the flex cable in the past and this time I know that it's not it (no difference if I open/close the slider).
My guess would be some power supply or LCD driver IC issues, because the screen stops working almost everytime if I put the phone into the dock. Moreover, if the screen doesn't work, the orange charging LED is not working (green and blue are OK). The moment the screen starts working, the orange charging LED starts working too.
it's very strange but I'm used to electronics doing strange stuff. Just wondering if I should give a try disassembling the phone and trying to fix it or just buy a new one or something?
I might add that I have bought a new battery ~3 months ago, but it's been working fine to this point. I have tried if the same problem occurs with the old/original battery and it's the same.
well, any ideas?
edit: This video shows something very similiar (except the backlight): https://www.youtube.com/watch?v=m4p0-kv1cxA

Same problem. And I guess this guy has it too.
http://forum.xda-developers.com/xperia-play/help/problem-flex-cable-brightness-t2803991
Any help?

P605 in need of some help.

Hi, hoping someone can help.
Having a major problem with my P605 (Hong Kong version), It just will not start up anymore.
Current State:
At the moment, with just the power button, it shows the samsung galaxy note 2014 logo. Then a few seconds later the startup sound will play. Then a few seconds later the samsung boot animation plays. Then once the animation stops and just displays the samsung logo, nothing else. It stays on that, and can stay on it for hours.
Note: The Samsung boot animation has a very pink hue to it, like the cyan and yellow are no longer there. More on that later.
With the Power + Home + Vol Up it says recovery mode is starting, then resets and boots as above.
With the Power + Home + Vol Down it goes into download mode no problem.
Background (Some of it may or may not be relevant, just putting it on here in case it is):
Up until a couple of weeks ago it was stock, but rooted JB (IIRC), then it was accidentally dropped (not by me). It is in a Trident Krakhen case, but that did not stop damage being done, the damage being the backlight stopped working. I followed a Youtube guide and removed/reinserted the ribbon. Put it back together and switched it on, and worked, sorted!
Now I thought as the seal of freshness has been popped, I may as well upgrade it to Lollipop so I can play Pokemon Go. As Lollipop has not been released for HK p605's I used the Irish (I think) firmware. Upgraded using Odin, no problem. So then I wanted root access, so I used the method described on XDA to root Lollipop using "CF-Auto-Root-lt03lte-lt03ltexx-smp605.zip". Again, flashed with Odin, no problem. But the root didn't take, a few programs randomly lost root access, others would not ask for access and just say the tablet was not rooted, etc. I reflashed the file at least 6 times to try and get it to take. Eventually it did.
Forward to the next day, I go to unlock my tablet and the screen has gone all pink, same as above, like Cyan and Yelow have gone. And a black shadow is over the left half of the screen. I restarted the tablet, colours came back, yay. All fine up until yesterday, the pink and shadow were back again. This was late at night while I was in bed, so not near the computer. I restarted the tablet. This time the pink stayed. OK, so I thought I will wipe the tablet back to factory and see if that helps (not done a wipe or anything else up until this point) so I try to go into recovery mode. It showed the logo and the little blue recovery text, then black screen, then normal boot logo and back into the OS. Tried a few times to get into recovery mode, but just kept resetting back to OS. So I told ROM toolbox to force a recovery restart, big mistake! It went into recovery boot loop. Just Galaxy Note 2014 entering recovery" then blank, repeat. No sound, nothing. I think that perhaps if I can turn it off, it may reset the whole thing, I put the tablet into download mode, then go to sleep. In the morning, the battery is dead. Great! Plug it in, instantly recovery boot loop. Fudge! From this point I don't know the battery level of the tablet, so that MAY be causing issues. I plug it into the PC to flash with Odin. Flashed stock lollipop, restarted, flashed stock bootloader, flashed CF auto root. Multiple times in each. Nothing seems to bring it out. The closest I got to something was the tablet telling me recovery was screwed and I needed to use Kies recovery. I left it plugged in for a few hours to try and build up some battery power, the PC does not provide enough power to charge, it makes the screen flicker rapidly when the battery is empty, but all the time while charging it is boot looping and the screen is on full brightness so I don't know how much I gained.
Finally flashed stock KK, and now it just hangs on the Samsung animation logo as above.
Is there anything I can do?
Does the pink hue and black shadow mean hardware is affected? The colours seem fine in download mode.
If anyone could help that would be great as I am scratching my head here.
EDIT 1: OK, I took the casing off, found that the little push on connector next to the usb connector had pried itself loose, I reattached it, and removed/reinserted the screen ribbon cable. All while the tablet was powered on (my old electronics teacher would have had a fit!). Restarted, the pink tinge has gone and the boot animation came up at the same time as the audio. Good signs. But still froze on the 'glow' effect. Tried recovery and YES it went into recovery, although the little android fell over with an exclamation mark over him. But still, progress. So now I am reflashing stock, will see how it goes.

Stuck on Boot: Black Screen on Boot

My LG G3 D855 appears dead. Without any apparent reason the screen turned black upon using the phone, and afterwards the phone did not boot to the OS, which has been updated to Lineage few months before.
Upon booting the LG logo might appear, and then the screen becomes black or blank. Even getting the LG logo to appear is difficult, usually nothing happens when booting the phone or replacing the battery. I have tried two different batteries.
I have three different screens. I have tried replacing the screen and the same problem persists, although in these cases the screen may also turn white. However, this may only be because of the screens. One I haven't tested before, and a other one is an old screen that was not in good condition.
What can be done to troubleshoot the black screen issue?

I managed to get into the (custom) recovery.
Anything in particular that should be done?