Purple bar at the bottom of the screen. - Huawei P9 Lite Questions & Answers

I have been looking everywhere to see if there is a way to fix this, but looks like this problem is not really common, this is my wife's phone and suddenly a purple bar that looks like distorted appeared a few months ago, sometimes it disappeared turning off and on the screen and sometimes it's not purple but black with a white lines. I never rooted this phone and actually kinda needs a software cleaning/reset to factory + cache clearing, I'm not sure if could be a software bug or hardware failure, tried to push the screen and see if there is any change but nothing, I haven't opened yet but the battery do not likes that is inflating (thought that could be pushing the screen out) since there are not sings of this.
Here are some examples.
http://imgur.com/oFglBlS
http://imgur.com/QBTYasD
http://imgur.com/4qloKpI

Darkuso said:
I have been looking everywhere to see if there is a way to fix this, but looks like this problem is not really common, this is my wife's phone and suddenly a purple bar that looks like distorted appeared a few months ago, sometimes it disappeared turning off and on the screen and sometimes it's not purple but black with a white lines. I never rooted this phone and actually kinda needs a software cleaning/reset to factory + cache clearing, I'm not sure if could be a software bug or hardware failure, tried to push the screen and see if there is any change but nothing, I haven't opened yet but the battery do not likes that is inflating (thought that could be pushing the screen out) since there are not sings of this.
Here are some examples.
http://imgur.com/oFglBlS
http://imgur.com/QBTYasD
http://imgur.com/4qloKpI
Click to expand...
Click to collapse
Hello dude,
with the hope that this is not a hardware problem
i think you should try software tests.
Backup all your personal stuff and do a factory reset + wipe cache.
Boot to eRecovery to do that (power off then keep and hold vol+ and power buttons till it boots).
If this will not solve the navbar issue, you could try to update to the latest official firmware.
Good luke !
Cheers

Dadditz said:
Hello dude,
with the hope that this is not a hardware problem
i think you should try software tests.
Backup all your personal stuff and do a factory reset + wipe cache.
Boot to eRecovery to do that (power off then keep and hold vol+ and power buttons till it boots).
If this will not solve the navbar issue, you could try to update to the latest official firmware.
Good luke !
Cheers
Click to expand...
Click to collapse
Thanks, gonna try this first. I was thinking the same that should be a software problem because its weird how behaves, yesterday the buttons were doubles, like a double image of them, then turning off and on the screen went back to the purple bar sometimes black.

Related

exec goes into continuos loop thing

Just got a s/h exec and I think it is faulty. Whats happens is it starts up ok and works for a while and then for no reason that I can think of it goes into a loop which stops it from working.
When I say a loop I'm not sure thats the right terminology but imagine if you tapped the start button and the start menu opens... and then imagine you tapped the tab button , the next item would highlight. If you tapped the tab button again the next item would highlight and so on. Well its as if the tab button is being hit over and over because all the items in the start menu will be highlighted one after the other over and over again.... it just goes round and round in a loop.
Its possible to escape from this and go to another screen but the same looping will go on in that screen too.
If you switch off and leave for a while and come back to it it works ok for a short time and thens starts the carry on again.
Sometimes if you just wait a while it stops, but will start doing it again even if you dont touch anything.
I've noticed one way to force it to stop is to slide the volume button... this seems to stop the loop and allows normal function for a while.... then the crazy looping starts again.
Has anyone seen this or know anything about it.
Nope sorry, maybe you can have it replaced where you bought it as from your post, you can recreate the problem easily.
Side Note : Have you tried Hard Resetting? Or installing another ROM?
I have tried hard resets and factory reset... problem remains.
Will try new ROM.... just trying to figure out how to do it !
weegee said:
I have tried hard resets and factory reset... problem remains.
Will try new ROM.... just trying to figure out how to do it !
Click to expand...
Click to collapse
Just download a new ROM form imate or something, unpack all the files in the ROM update to a directory, put the attached file in same directory.
Enter bootloader mode (Backlight + Power + Reset Hole) you will see SERAIL on the screen but not backlight so look hard.
Plug into PC, the SERIAL will change to USB
Run the attached file. You will see a photo of an S100 but continue anyway....
Hard reset when finished... DOne
ok have installed latest rom... but exec still doing loop loop
Just for arguments sake, can you try installing Imate's newest ROM?
yea thats the one i have just put on.
It seems to be doing the problem less than before. I notice that it does stop if i press the backlight key or move the sound slider.
I'm wondering if there is dust or dirt got in behind the buttons or something like that... although I would have thought other people would have come across this b4 if that was the problem. The machine is one of the first to come out, although I just got it a couple of days ago.
weegee said:
yea thats the one i have just put on.
It seems to be doing the problem less than before. I notice that it does stop if i press the backlight key or move the sound slider.
I'm wondering if there is dust or dirt got in behind the buttons or something like that... although I would have thought other people would have come across this b4 if that was the problem. The machine is one of the first to come out, although I just got it a couple of days ago.
Click to expand...
Click to collapse
If you have tried different ROM flavors and still get the same problem, then it is definitely hardware related. Send your unit in and demand for a new one not a repair
Just been playing around with it again and notice that I can make the problem happen if i press any of the keys on the navigation pad except the top one.... and i can stop the loop by pressing the light button.
Weird or what.
My initial thought on this is maybe its got wet at some point
I have opened the xda up and stripped it down to all its parts. No sign of any dampness or dust dirt etc. Dont see anything missing or broken.
Put back together, but still doing this.
Driving me nuts.... its a great machine but is very tiresom to use with this going on.
Another think I notice about this machine, I have never used it as a phone, but I tried putting a sim card in and There is no sound through the earpiece. Only sound comes from the speakers when you set it to speaker phone.
I suggest just return it and have it replaced. It's probably a faulty button. Probably gets stuck whenever you press it.
Doesnt need a button to be pressed for it to start.. just starts by itself... and can stop by itself too.
Sometimes it can for ages without doing it, other times it does it all the time.
Cant figure if its hardware or software problem
GHOST-IN-THE-MACHINE
Yea... maybe I should get a priest !
I had this problem when i first got mine, if you move the sound slider down, then up, it seems to stop doing it for a while, and it hasn't happened in the last couple of weeks atall, maybe its because its new, and just needs to settle in?
Jay
Well at least I'm not the only one to have it.
My sound slider does stop it happening but only for a while and then it starts up again.
The machine is perfect in every other way, its just an annoyance I could do without.
I've tried everything, even stripped it down and left parts out, like buttons, to see if they are the source, but no difference.
I have the same problem!!!!!!!!!
Someone help please!!!!!!!!!!!!!!!!!!!!!!!
I have same problem. I send to service but until today they can't repair that problem.

Problem with my TYTN

Hi everyone.
This just started 2 days ago. This never happened before
When i turn on my phone everything is ok the screen is fine, but hen once it loads up its starts to lag. memory on the phone is not an issue. the scroll on the left side doesnt allow me to scroll down or up , the wheel moves but the on the screen nothing moves. Now the worse part is the screen.
When i turn off my screen and then turn it back on.. the colours are all messed up. the screen is a pinkish blue coulour and almost unreadable. i tried a soft reset and the screen goes back to normal but once I turn off the screen and turn it back on , i get the same problem.. Now do you think a hard reset would fix the problem?
I had this start last weekend. I had the screen issues and the hardware buttons were very sporadic in function. Most of the time they just didn't work.
I flashed back from Black Satin to the T-Mobile rom and sent it off for repair. Should hear back next week as to the outcome.
Is your under warranty? Just send it away.
Only downside is I've only got a Blackberry Pearl as a backup at the moment.....
The above advice is good. Before going for warranty repair though you should do a hard reset to rule out a software issue.
Mike
No its not under warranty. I have no idea what rom is on it. I-MATE ROM is what shows up when it boots up. So it sounds like a hard reset will be the first choice. im not very familiar with these things so pardon if i sound a bit off. i wouldnt even know how to flash or anything like that.
Well i tried to hard reset and it it seems not to be letting me do that.
just hold the left and right soft key and press the reset button at the same time and wait for a prompt to pop up.. nothing it just soft resets.. now im getting a bit frustrated.
Cakez said:
No its not under warranty. I have no idea what rom is on it. I-MATE ROM is what shows up when it boots up. So it sounds like a hard reset will be the first choice. im not very familiar with these things so pardon if i sound a bit off. i wouldnt even know how to flash or anything like that.
Well i tried to hard reset and it it seems not to be letting me do that.
just hold the left and right soft key and press the reset button at the same time and wait for a prompt to pop up.. nothing it just soft resets.. now im getting a bit frustrated.
Click to expand...
Click to collapse
Well, I assume you have tried a few times. It's difficult sometimes to get them all simultaneously pressed. Incidentally, just in case there's any confusion - the soft keys are actually the hard keys with dashes on the D-Pad.
Another way is to go to Sart>Settings>System>clear storage icon.
Just bear in mind that if there is a major problem it may fail completely and you end up with even more of a problem than now - but I guess there is no choice really.
Mike

[Q] Black Screen...

Hello all. First let me state that I rather not make a thread to ask help on a problem that seems to have happened to a few owners, but my knowledge as to how I could resolve the issue is severely lacking..
At some point today my phone was ringing but the screen would not show. I thought about taking the battery out and turning it back on but there would be no HTC, Bootanimation, anything. It was Just a black-lit screen which responds due to tactile feedback and the four touchkeys light up as usual. At first there was an odd sound that would play after a few minutes so I decided to charge it but again there was nothing. Even tried to access bootloader with -Vol and Power still no screen.
I asked a friend of mine to call my phone to see if it would ring but they said it instantly goes to voicemail as if my phone was off. Note that I WAS SURE IT WAS ON.
Adb seems to work with it as it seems whatever I need to do I have to do it through there.
G2 rooted with gfree method
CM7.1 RC1
Clockwork Recovery
Again i am sorry if I bothered those with posting something others would think is "too common of a problem" as I have no experience in fixing this issue. Plus I would like to try any option available as I would not like to try and have my phone replaced (because of the risk of discovering root and obtaining a G2 with stock gingerbread which is currently not rootable)
Please help..
It sounds like you're suffering from some sort of hardware failure. You need to send your phone in for repair/replacement.
The Unnamed Time Lord said:
Hello all. First let me state that I rather not make a thread to ask help on a problem that seems to have happened to a few owners, but my knowledge as to how I could resolve the issue is severely lacking..
At some point today my phone was ringing but the screen would not show. I thought about taking the battery out and turning it back on but there would be no HTC, Bootanimation, anything. It was Just a black-lit screen which responds due to tactile feedback and the four touchkeys light up as usual. At first there was an odd sound that would play after a few minutes so I decided to charge it but again there was nothing. Even tried to access bootloader with -Vol and Power still no screen.
I asked a friend of mine to call my phone to see if it would ring but they said it instantly goes to voicemail as if my phone was off. Note that I WAS SURE IT WAS ON.
Adb seems to work with it as it seems whatever I need to do I have to do it through there.
G2 rooted with gfree method
CM7.1 RC1
Clockwork Recovery
Again i am sorry if I bothered those with posting something others would think is "too common of a problem" as I have no experience in fixing this issue. Plus I would like to try any option available as I would not like to try and have my phone replaced (because of the risk of discovering root and obtaining a G2 with stock gingerbread which is currently not rootable)
Please help..
Click to expand...
Click to collapse
A. They don't care if its rooted.
B. You can root stock Gingerbread.
Same issue here...
I'm facing the same issue, when i try to unlock the phone (power button or trackpad) the screen lights but stays black, and the buttons are also backlit. I have to lock again with power button and unlock again to get to the actual screen.
It first happened a few days ago, and since i didn't reboot/restart in weeks i tried to reboot but the same issue comes back.
then i shut it down, pulled the battery and then back, and restarted: the phone goes directly to that black backlit screen, i tried several times and tried recovery with no luck, so i thought my phone was messed up although i did have some haptic feedback, well in fact the phone was actually booting, but just not showing anything else than the backlit screen; i waited a minute or so to the booting completes (still shows nothing), then i lock/unlock the screen again and there it is, asking for the pin code.
I tried to go to the recovery again to try to wipe dalvik-cache, i know for sure it goes to recovery, but with a totally black screen, not even backlit this time; the trackpad is too sensitive in the recovery to just blindly navigate in the menu, so it is not useable at all.
Then i had the idea to go to Rom Manager, i reflashed the rom from my sd-card, and enabling wipe dalvik-cache, which worked (all through a black screen). After a few minutes i "felt" it rebooting (vibrating) but still back to that black backlit screen, and i locked/unlocked it again and back it was asking pin code...
I also tried to roll back recovery to 3.0.2.4, since i remember i updated it a few weeks ago, but still the same issue.
I don't know what else to do without accessing the recovery, i wanted to try another kernel, or remove the trackpad wake... is there a way to do it via a script? I guess it's what Rom manager does...
Next step will be a total wipe, but i need to make some room on my sdcard for backup purposes first...
If anyone has an idea to sort this out, i'm highly interested...
I'll try to get a logcat, maybe could give a hint
Edit: Virtuous sense 2.0.0 (used it with no issue since it came out, could it be a hw issue?)
Edit2 : attached logcat
Is the pin screen differant than the usual one ie white number keys? If it is that's the sim lock screen you need to call the carrier to get the code or find out the default. Or just get a new sim lol
nah it's the 4 digit pin code, i didn't lose it btw, it's still working and i can use the phone, but i have a black backlit screen whenever i want to wake the phone, and thus when i receive a phone call, i don't know who it is and i blindly press/swipe the screen to answer, because if i want to use the same trick of locking /unlocking, it doesnt work as the lock button is also used to reject a call...
Maybe rip and reinstall the phone app?
asim0 said:
I'm facing the same issue, when i try to unlock the phone (power button or trackpad) the screen lights but stays black, and the buttons are also backlit. I have to lock again with power button and unlock again to get to the actual screen.
It first happened a few days ago, and since i didn't reboot/restart in weeks i tried to reboot but the same issue comes back.
Click to expand...
Click to collapse
I have the same exact problem as this EXCEPT, it's intermittent. Sometimes when I wake the phone I get an all black but backlight screen, and other times it's fine. I'm on CM7.1.
But a superwipe and reflash will probably fix it. Also don't restore system data on TB
I know i still can use wipe data + cache + dalvik through rom manager, and i always used to superwipe before switching roms, but how can i do that now when the recovery is all blacked out?
can anyone guide me to a script or something i could do while the phone is active, to tell him to reboot to recovery and flash that superwipe?
anyway i'll try the regular wipe and keep the thread updated
---------- Post added at 02:42 PM ---------- Previous post was at 02:35 PM ----------
SuperDave81 said:
EXCEPT, it's intermittent.
Click to expand...
Click to collapse
On my side if i leave the phone locked more than 30 seconds, it happens 100% of the time; also I noticed that now the backlight blinks 2 or 3 times (1 second blinking) when locked, first a few minutes after locking, and then randomly, about 3 or 4 times per hour; I guess it's getting worse;
I've read on another thread that it could be video cable getting loose, but since mine is still under guarantee, i won't open it right now just to check, if i can't fix by wiping / superwiping (when i know how to), i'll use that guarantee, which is one month left (lucky me)
EDIT: one other thing that makes me think it's no hardware, when the black screen appears because of a phone call or a message, the ringtone and notification sound are both half as loud as they should be, this is all really strange
after backing up my data, i reflashed the rom via Rom Manager, and I wiped data and cache (which equals to factory reset) this time: the first screen that should show the pin code numpad was already a black (backlit) screen!!
Also, thinking about it, i realised that the "flash rom from sdcard" menu in Rom Manager is in fact "Flash ZIP from sdcard": the zip doesn't have to be a ROM!!
So I tried flashing a new kernel this way, also some framework modifications (extended settings, removed TP wake, etc...) they all install Ok, but still this black screen...
Also I was about to flash SuperWipeG2.zip this way, but if it doesn't fix my problem, I will be stuck with a blacked out recovery, as SuperWipe wipes everything including /system; so if anyone has an idea to tell Rom Manager to flash two zips (Superwipe then Rom) i'll be willing to try, or a script to do that;
Maybe i'll have a look of the scripts in Superwipe and in the rom, and put both zips together... don't know if it's possible?
Maybe I'll try the Superwipe alone if I can get a spare phone, just in case...
Other thing:I used the phone's gps for more than 5 hours with the screen lit, and it never flickered even once; so it's hard to believe it's a screen connection issue...
Just to keep this updated, everything i did, including superwipe didn't change this issue, so i sent it back to the technical support (under guarantee) and I got it back today; the report that came with it says the screen has been replaced; so it was hardware finally...
Hi, i have same problem.. Black screen in recovery and during the boot. When the system boots, screen is OK. Sometimes i have also blackscreen when I want to use HW keyboard. I tried 4ext, reflash older versions of CW but still the same. I can see a screen through Android Screen Monitor and I can cotrol it. But phone is blak, only backlight. Can somebody say, how to solve this issue?
So, for other, if you cant see screen, you can use Android Screen Monitor for Windows and connect phone through USB and see a screen.
G1ForFun said:
A. They don't care if its rooted.
B. You can root stock Gingerbread.
Click to expand...
Click to collapse
WAIT one minute... they don't care? where was I when this meeting took place?
I had this issue as well on a spare G2 I had.
The screen was just black but you could tell it was lit, hardware keys were lit as well.
The phone was actually my brothers and it rooted w/ CM7.
I ended up selling the phone as is on Ebay but after some research it was a failure in the hardware for the screen and I found extensive instructions on how to replace it that I didn't wish to do.
I never attempted to get it replaced and kind of wish I did now if they don't care about the device being rooted.
I purchased my G2 before he had his, and it's never had the issue so not sure what to think of it.
Saintfyre said:
I ended up selling the phone as is on Ebay but after some research it was a failure in the hardware for the screen and I found extensive instructions on how to replace it that I didn't wish to do.
Click to expand...
Click to collapse
I think I have similar issue, can you post where you found those instructions?
Thanks in advance!
http://www.youtube.com/watch?v=u-dR8CHEGjY&feature=youtube_gdata_player
Sent from my HTC Vision using XDA Premium App
I used the same tutorial to change the LCD but after I put the new its just the backlight but nothing else... I will give it another go maybe and have a look again at those ribbon cables! I guess...
---------- Post added at 10:59 AM ---------- Previous post was at 10:09 AM ----------
I found on ebay: HTC-Desire-Z-T-Mobile-G2-A7272-Slide-Flex-Cable-Ribbon
or I found also with the chassis for a bit more.
Thinking to buy this, it would be great if anyone could confirm that it would help "my condition" ?
THanks in advance!
In terms of cables, yes the flex cables are what you want.
Sent from my T-Mobile G2

LG G2 D802 Digitizer replacement turns into white fail

Hi xda-members,
i´ve got an problem.
I replaced the Digitizer of my Phone and wanted to turn it oon.
Now the digitizer stays white but the touch works.
I can't see the window to type my PIN.
Can you help me to fix that problem?
sincerely lucky93
Lucky93 said:
Hi xda-members,
i´ve got an problem.
I replaced the Digitizer of my Phone and wanted to turn it oon.
Now the digitizer stays white but the touch works.
I can't see the window to type my PIN.
Can you help me to fix that problem?
sincerely lucky93
Click to expand...
Click to collapse
So far as i know is that sometimes the phone just doesn't want to accept the new display and then you gotta perform a soft reset so that old data maybe also related to the display are getting removed and that the phone Might accept the part then. In most cases this works like that hope that it works by you too. if you cant see the window to type your pin then try to find a video or a image from the lockscreen and enter your pin. Maybe you can do it if you can blind remember how it looked like:good:
wulsic said:
So far as i know is that sometimes the phone just doesn't want to accept the new display and then you gotta perform a soft reset so that old data maybe also related to the display are getting removed and that the phone Might accept the part then. In most cases this works like that hope that it works by you too. if you cant see the window to type your pin then try to find a video or a image from the lockscreen and enter your pin. Maybe you can do it if you can blind remember how it looked like:good:
Click to expand...
Click to collapse
How can i do soft reset, i got a custom rom on it.
Lucky93 said:
How can i do soft reset, i got a custom rom on it.
Click to expand...
Click to collapse
Press and hold Power Button (around 5 seconds).
Your device will now shut down and reboot.
Alternate Method; With your device turned off…
Press and hold Power Button until the LG Logo appears then release
wulsic said:
Press and hold Power Button (around 5 seconds).
Your device will now shut down and reboot.
Alternate Method; With your device turned off…
Press and hold Power Button until the LG Logo appears then release
Click to expand...
Click to collapse
I see only the white display, no lg logo or anything, thats my problem
Lucky93 said:
I see only the white display, no lg logo or anything, thats my problem
Click to expand...
Click to collapse
Yeah i know but this should be an fix which also worked on other phones so:silly: did you tryed it already? maybe multiple times. It still seems to me like a software issue.
wulsic said:
Yeah i know but this should be an fix which also worked on other phones so:silly: did you tryed it already? maybe multiple times. It still seems to me like a software issue.
Click to expand...
Click to collapse
I clicked the button for 5 seconds. It does nothing,
i have to go to TWRP Mode to do a software reset.
I tryed to fix that problem by charging my phone, Now its fully charged and the display doesnt work now.
How can i do a software reset without a working display?
Is there any method by usb and computer?

[Q] Screen goes black after booting into android.

Hello, yesterday I started having a problem with my i9505 that I never seen before....
I noticed that when I unlocked the screen, the screen kept black and just the led on the buttons turned on, so I tought the phone had frooze, and I took the battery out then put it back and turned the device on again...
The "samsung galaxy s4 i9505" scren appeared just fine, the cm splashscreen was fine too, but when it finished booting, the screen went black...
I noticed that the screen doesn't give any haptic feedback, the buttons that are lit give haptic feedback normally, and the home button also don't have any feedback, even by pressing it, or holding it...
If I take screenshot, the screen flashes white, but goes back to full black....
If I hold the power button, the options "Power off - Reboot - Airplane mode" appears, and the buttons work, but if I press outside the popup, the screen goes black...
So, there's no hardware problem related to the screen, since it works fine while booting, and on recovery mode
But there's something software related that makes the screen keep black after booting, and it's not brightness related, since the menu by holding power button shows correctly...
Has anyone seen anything like this?
My device is an i9505
The ROM I'm using is optimized cm12.1 from JDCTeam:
http://forum.xda-developers.com/gal...lop/exclusive-antaresone-alucard24-s-t3066696
Specht77 said:
Hello, yesterday I started having a problem with my i9505 that I never seen before....
I noticed that when I unlocked the screen, the screen kept black and just the led on the buttons turned on, so I tought the phone had frooze, and I took the battery out then put it back and turned the device on again...
The "samsung galaxy s4 i9505" scren appeared just fine, the cm splashscreen was fine too, but when it finished booting, the screen went black...
I noticed that the screen doesn't give any haptic feedback, the buttons that are lit give haptic feedback normally, and the home button also don't have any feedback, even by pressing it, or holding it...
If I take screenshot, the screen flashes white, but goes back to full black....
If I hold the power button, the options "Power off - Reboot - Airplane mode" appears, and the buttons work, but if I press outside the popup, the screen goes black...
So, there's no hardware problem related to the screen, since it works fine while booting, and on recovery mode
But there's something software related that makes the screen keep black after booting, and it's not brightness related, since the menu by holding power button shows correctly...
Has anyone seen anything like this?
My device is an i9505
The ROM I'm using is optimized cm12.1 from JDCTeam:
http://forum.xda-developers.com/gal...lop/exclusive-antaresone-alucard24-s-t3066696
Click to expand...
Click to collapse
You could have problems with your gapps, try minimal gapps for 5.1, made by jabj
Hope I helped :3
_Bon_Bon said:
You could have problems with your gapps, try minimal gapps for 5.1, made by jabj
Hope I helped :3
Click to expand...
Click to collapse
Do you mean flashing over the system I have now?
I tried flashing the ROM again wiping just cache and dalvik cache, but didn't help
Are you using xposed?
donkyshot said:
Are you using xposed?
Click to expand...
Click to collapse
No, never used xposed
I've seen this before, but it took me a while to remember where. Usually, a black screen as you're describing occurs when the device has no launcher app. Since there is no launcher app there's no way to do anything. Now, it's unlikely you removed all your launchers so I can only guess you have a software issue with the launcher app itself.
Try doing a dirty flash of the ROM, if you haven't already done so. Don't wipe data or internal storage, but do wipe the cache. See if that solves the problem.
Strephon Alkhalikoi said:
I've seen this before, but it took me a while to remember where. Usually, a black screen as you're describing occurs when the device has no launcher app. Since there is no launcher app there's no way to do anything. Now, it's unlikely you removed all your launchers so I can only guess you have a software issue with the launcher app itself.
Try doing a dirty flash of the ROM, if you haven't already done so. Don't wipe data or internal storage, but do wipe the cache. See if that solves the problem.
Click to expand...
Click to collapse
I alreadly dirty flashed the ROM wiping cache and dalvik cache
You're probably going to have to wipe everything then. Make a nandroid backup however, as you can restore your data partition after flashing.
Could be a Rom bug too...
Specht77 said:
Hello, yesterday I started having a problem with my i9505 that I never seen before....
I noticed that when I unlocked the screen, the screen kept black and just the led on the buttons turned on, so I tought the phone had frooze, and I took the battery out then put it back and turned the device on again...
The "samsung galaxy s4 i9505" scren appeared just fine, the cm splashscreen was fine too, but when it finished booting, the screen went black...
I noticed that the screen doesn't give any haptic feedback, the buttons that are lit give haptic feedback normally, and the home button also don't have any feedback, even by pressing it, or holding it...
If I take screenshot, the screen flashes white, but goes back to full black....
If I hold the power button, the options "Power off - Reboot - Airplane mode" appears, and the buttons work, but if I press outside the popup, the screen goes black...
So, there's no hardware problem related to the screen, since it works fine while booting, and on recovery mode
But there's something software related that makes the screen keep black after booting, and it's not brightness related, since the menu by holding power button shows correctly...
Has anyone seen anything like this?
My device is an i9505
The ROM I'm using is optimized cm12.1 from JDCTeam:
http://forum.xda-developers.com/gal...lop/exclusive-antaresone-alucard24-s-t3066696
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I hope you tried reflashing your CM12. If that didn't work clear all data and flash a freshcopy of CM12. It could be a problem with your Rom too.... you could get an update soon..
I had the black screen problem and it turned out to be the silicon case I had just bought for it. Guessing it was pressing buttons together or something causing a corruption. After restoring it twice, twigged this and binned the case. Problem solved lol

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