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
Phone - I400 (Continuum)
So I turned my phone on and it got stuck in a boot up, samsung logo then the verizon would come up and the phone would get stuck there. After i went through the typical remove battery, wait a while turn on again, I still couldnt get it to load. On my last attempt at this instead of any logos, I got a completely white screen with a black bar. I had done no flashing prior to this point. All that will load is the android digging screen. It is detected by odin but nothing will work on it. I have a picture that I will load up when I get back home.
If you have any ideas how to fix this, it would be greatly appreciated.
thebod15 said:
Phone - I400 (Continuum)
So I turned my phone on and it got stuck in a boot up, samsung logo then the verizon would come up and the phone would get stuck there. After i went through the typical remove battery, wait a while turn on again, I still couldnt get it to load. On my last attempt at this instead of any logos, I got a completely white screen with a black bar. I had done no flashing prior to this point. All that will load is the android digging screen. It is detected by odin but nothing will work on it. I have a picture that I will load up when I get back home.
If you have any ideas how to fix this, it would be greatly appreciated.
Click to expand...
Click to collapse
If you have not flashed the phone, I would call Verizon and have them send out a replacement. My very first Continuum did that to me. After I received the replacement, I started flashing it, and haven't had issues with flashing. I have had a total of 4 Continuums. The first one did something like yours. The next two have/had critical memory errors, and this one has a broken camera. I think I am getting lemons... But, when you get refurbished items, one never knows what to expect...
Nexus 7 was working fine and then I pulled it out and notices a gray screen. Restarted it and I get a slight blue shadow to the Google and Padlock boot screen. Then it begins to change crazy colors and ends up fading to a gray screen. Can't boot into recovery from fastboot. Help?
Here are some pictures in order of boot.
cbcampos said:
Nexus 7 was working fine and then I pulled it out and notices a gray screen. Restarted it and I get a slight blue shadow to the Google and Padlock boot screen. Then it begins to change crazy colors and ends up fading to a gray screen. Can't boot into recovery from fastboot. Help?
Here are some pictures in order of boot.
Click to expand...
Click to collapse
Wow, I haven't seen or heard of any defect like that in the N7 yet. I would exchange/RMA the device if I were you. It seems like an easily demonstrable problem, there shouldn't be any reason Google/a retailer wouldn't exchange it.
Sent from my Paranoid Nexus 7
RockNrolling said:
Wow, I haven't seen or heard of any defect like that in the N7 yet. I would exchange/RMA the device if I were you. It seems like an easily demonstrable problem, there shouldn't be any reason Google/a retailer wouldn't exchange it.
Sent from my Paranoid Nexus 7
Click to expand...
Click to collapse
Even with the bootloader unlocked? Or do I need to somehow lock it?
update
cbcampos said:
Nexus 7 was working fine and then I pulled it out and notices a gray screen. Restarted it and I get a slight blue shadow to the Google and Padlock boot screen. Then it begins to change crazy colors and ends up fading to a gray screen. Can't boot into recovery from fastboot. Help?
Here are some pictures in order of boot.
Click to expand...
Click to collapse
It actually seems as if it is partially just a screen issue. I heard a notification of an email on the N7. I believe it has actually booted up, but the display is stuck. If I tap where the notification bar would be, I heard audio feedback.
UPDATE: I suspected something was loose in display connection because of the type of problem. I knocked pretty hard on the device, and the display kicked back in. Doesn't solve the problem of being unable to boot into recovery, but it seems like it could be a display problem. Suggestion still to just get a replacement? and relock bootloader?
cbcampos said:
Even with the bootloader unlocked? Or do I need to somehow lock it?
Click to expand...
Click to collapse
My bad, I skimmed your post and didn't realize you could get into fastboot mode. Try turning off the N7, connecting it to a computer , and getting back to fastboot mode. You should be able to use adb to relock the boot loader. In fact, you should be able to boot into recovery from fastboot since the N7 is connected to a computer.
Good job trouble shooting the display connection! I would still personally recommend exchanging/RMA. You never know when the problem might reappear even if you "fix" it.
Sent from my Paranoid Nexus 7
Take the back cover off and check the display ribbon cable,and all other connections are tight. They won't be able to tell that the back was removed, unless you ding it up. Might find a loose connection. May just save you the trouble of going through RMA.
Hi,
After Xmas I made factory reset with TWRP and I made an upgrade to CM13.(6.0)
It was working fine.
When I was trying to make next daily update, after reboot, screen became black and nothing shown up.
I was trying a lot of things since that moment.
When I was going back from service point (I really want to sort it out) when they told me it is probably LCD broken (i have broken glass, but 1 year ago, so I do not believe it can be screen),
when I take phone out I spotted that keys are highlighted so I swiped and it locked out and shown screen! it was working perferctly fine,
so I decided that it is best moment to flash newest CM to solve issues, but after reboot screen was black again.
I can enter download mode so it is visible in Odin, but screen is black in every mode.
There is only quick flash on screen when turning on and also really short moment of Samsung Galaxy logo which becoming dark quite quickly.
I flashed stock rom(5.0), but nothing changed, despite of that I know phone is turning on somehow because I hear music on turning on...
Can someone help?
I really doubt that it can be hardware issue.
Can it be something with BL ? How can I solve it...?