Database Develop

Screen lighting issue.

XDA-Dev:
I hope this finds you in high spirits and good health. Just a day ago my phone started acting peculiar regarding the lighting of the touchscreen.
Firmware: 1.6 // Build: DRC83 // Rooted: No
Damage: Slightly scratched hard plastic from dropping 2-3 times. Otherwise, outwardly pristine
Upon purchasing the phone, I immediately noticed that the screen would creak if it was pressed on the bottom right hand side (by the send button). The right side of the screen also protrudes slightly higher than the left when in the open position. I have owned the device for about 7-8 months now and have noticed that on the rear, when in open position, there is a scratch where the sliding mechanism moves. The paint is stripped and the underlying metal is displayed in those areas. And now on to the issue at hand:
When the phone is closed (touchscreen only):
- When pressing MENU, or any key that would normally illuminate the screen, this does not happen. The screen stays dim, yet the lights on the buttons bellow it brighten.
- If I slide out the keyboard while the screen is supposed to be on (meaning the buttons are lit up), nothing happens.
When the phone is open (keyboard presented):
- And the screen is off, if I press MENU, the screen comes right up with no brightness issues.
- At this point, if I close the keyboard, the backlight disables itself. The screen is NOT completely blank. If I reflect the light of the room off of it, I can just barely make out that it is indeed displaying whatever task it was that was open, but if I were in a dark room, there would be no chance of recognising what is being presented.
- Continuing from above, once the screen's backlight is disabled and I reopen the keyboard, it does not turn back on. I must turn off the screen and turn it back on for the backlight to resume normal functioning.
One would think that if the issue lies in a loose wire that once the keyboard is extended that the backlight would regain normal functioning. Because this is not happening and that it is only working under certain circumstances, I cannot accurately ascertain whether this is a software or hardware problem.
Attempted remedies:
- Soft reset (both rebooting the phone by powering off and on and by going into the reset menu)
- Hard reset (by going into the reset menu and hitting ALT+W, etc)
Neither of these attempts succeeded in restoring functionality of the backlight. I've also search high and low through the settings, but see nothing other than 'Brightness' under 'Sound & Display.'
It may be noteworthy that I have the paid application 'Power Manager' installed. Though, perhaps not since this issue was still occurring AFTER the factory reset when no foreign applications were installed.
If you require any additional details, feel free to give a reply with any questions. I'm sincerely hoping I don't have to deal with T-Mobile or HTC to have this repaired. Any tips, ideas or possible solutions would be greatly appreciated!
Regards,
Ian

Update on issue:
On the way home from work, as the battery was on it's last leg (less than 10%), I turned off the screen while the device was in the open position after finishing a text. Upon attempting to re-activate the screen, it would not do so. As always, the side buttons lit up, but the screen was blank no matter what I did. I could hear the vibration from receiving texts and the red 'omg I\'m dying LED' was still flashing, so the device had not died.
Returning home, I gave it a reboot by removing and replacing the battery. I've kept it in the open position since it has been plugged in and am quite afraid of manipulating the slide mechanism any further.
I'll be calling t-mobile to get their opinion on any further troubleshooting momentarily and report back.

Sorry for opening an older thread. do you remember what t-mobile said was the problem? i am having the same issue.

simplewhite said:
Sorry for opening an older thread. do you remember what t-mobile said was the problem? i am having the same issue.
Click to expand...
Click to collapse
The ribbon wire in the slide mechanism is either broken or pulled out of socket.

Screen died, manufacturer defect?

Hey, Last night I was texting with my phone. I closed the keyboard, and the screen didn't flip to portrait mode. I opened it and closed it again and it remained frozen. Then it dimmed, and the screen was consumed by red green blue and white lines. I did a soft reset and the phone turned on, but only a dim light emanated from the screen, no picture whatsoever. The phone did boot completely, I heard a text message come in, pressing buttons made the appropriate tone. I used no custom roms, nor did I get it wet.
Does this sound like a manufacturer defect? Is there a history of this happening?

MrGneissGuy said:
Hey, Last night I was texting with my phone. I closed the keyboard, and the screen didn't flip to portrait mode. I opened it and closed it again and it remained frozen. Then it dimmed, and the screen was consumed by red green blue and white lines. I did a soft reset and the phone turned on, but only a dim light emanated from the screen, no picture whatsoever. The phone did boot completely, I heard a text message come in, pressing buttons made the appropriate tone. I used no custom roms, nor did I get it wet.
Does this sound like a manufacturer defect? Is there a history of this happening?
Click to expand...
Click to collapse
It sounds like what happens when there is a connection problem between the lcd and the motherboard. If your mobile has warranty, then bring it in. The connections are a press fit type thing, and in my opinion very poor engineering. If you have nothing to lose, then find the dissassembly videos and make sure the connections are being made. Do a search for the "Microp Error". At least I think that is what it is called.
There are some hints there, I believe.

for starters it sounds like you have a pro, not a diamond.
the pro has a problem with chafing of the ribbon cable as it passes through the slider mech.
the cable conductors become exposed and short across the screen mount plate causing the display to lose colors or go blank.

Green vertical line when switching off the display

Hello everybody, I have the following "visual effect". It happens roughly 50% of the times the display switches off. It doesn't matter if it is by it self, by the power button or by a software button. In the very moment when the display switches off, a greenish dot in the center of the display flicks for a split second, along with a same color vertical line trough the whole screen. Obviously it is not supposed to be this way Beside this issue, there is no other problems with the display or the phone( for now). What do you think about this? Thanks in advance

Sounds like a screen off CRT effect, check you tube to see if that is your problem

Isn't the CRT effect a horizontal white line ending up in a dot?
I genuinely think the OP's screen may be defective...
Sent from my GT-N7000 using xda app-developers app

do a lcd test and check if all pixels are working ok

Unfortunately it is not a CRT effect, although it looks a bit like it. The difference is, that the line and the dot( little spot) appear simultaneously for a fraction of a second. In a daylight it is hard to see it, even more it happens just 50% of the times, but not every other time. Its somewhat random.
The *#0*# test do not show much. No dead pixels. On blue you cant see anything, on green and red I think I see a little bit darker spot in the center of the screen( where the dot/spot appears), but there are such darker sports and elsewhere on the screen.
BTW, I noticed recently, that when the screens dims a bit shortly before switching off, this dimming happens not so smooth. How should I say it... it happens on a several steps, although the whole thing is done in less then a second, it is not so fluid. Is it supposed to be this way?
Thanks for your help guys

have u tried flashing a different rom stock

I am on the latest German stock 4.0.4, tried several others, including 2.3.6. .Currently with Hydra kernel. No difference whatsoever. I think the auto-brightness doesnt work so good. When set on fixed value it dims more fluidly.

if u on stock rom and not rooted then take it to a service center

[Q] Screen goes black during call, CM10.1 dialer

Hiya folks. Running CM10.1 stable on my targa (aka Droid Bionic). It was beautiful except for lack of nav dock support, a problematic Google Now (different problem, with workaround), and this particular problem, which I hope someone know what I am talking about...
When a call comes in and I answer by the slider, the screen goes black, whether or not I held the phone up to my head.
I cannot turn the screen back on. None of the buttons seem to do anything, though backlight for the 4 hard buttons does turn on indicating that some command was received by the touchscreen. Not even the power button will bring the screen back during the call.
If the other party hangs up, the phone goes back to normal.
With screen off, I can't hang up.
I can hang up if my Bluetooth headset was connected and I hang up with that.
I've searched all over and this issue seem to be a pretty popular issue last December across all CM 10 builds. However, I don't know if this was ever resolved for this build.
I can't find an option in the ROM to just flat "turn off face proximity detection" either. Or in any way to "tweak" it.
CPU-Z says my proximity sensor is working, so I guess it's just not calibrated properly for the dialer?
Can we get a "special hidden tweaker" much like the light sensor tweak for the auto-brightness levels?

Figured it out. It wasn't CM. It was Screebl and the stupid orientation sensor, and how the Launcher is fixed to portrait mode.
I think I had my phone laid down and it's at a diagonal so it's in landscape mode, and the phone's fine with that when it's just showing contacts. Screebl kicks in and determines that landscape, phone orientation says stay on, so screen stayed on. It was set to turn off the screen IMMEDIATELY when the orientation goes out of "viewing range". (Saving batteries, ya know).
When the call was answered, Screebl should have turned itself off (i.e. ignore input while call is in progress). But it didn't. The "answer the phone" screen flipped the display back to portrait mode. The phone, still laid flat, in "landscape", is now "out of viewing range", and Screebl turned off the screen.
Strange interaction among the various apps, yes.
I'm still trying to figure out how to make my Bionic, with extended battery last the whole day. Juicedefender Ultimate somehow just keeps turning the screen back on every X seconds (taking root control for SOMETHING) and Wakelock detector says the phone is not going into enough deep sleep (kinda like me, hahaha)

[Q] Droid 4 backlight failure on automatic brightness.

Hello!
I wonder if anyone had this issue. Yesterday suddenly the backlight of my XT894 started to act weirdly. When i pressed the unlock button, the screen would go very bright and then shut off after 2-3 seconds, but I still could swype the unlock screen and hear the unlock click, even with the dark screen. With a little bit of external light I could see the image was there, but the backlight of the screen was not on. I went on to the power shortcuts and disabled the Automatic brightness control, and as soon as I did that the display turned on, very dimly but it turned on. When I set the brightness control to maximum, it still is very low. If i set the brightness to minimum, its almost impossible to see anything. In display settings, the automatic brightness is unchecked and the brightness fader is set to maximum.
I started suspecting the light sensor, so I went ahead and downlaoded a sensor tester app, and the light sensor appeared to be reporting the light levels correctly - low readings in the dark, and much higher readings in direct light.
Is my phone backlight dying? Any idea if this might be due to defective mainboard, or the display itself?
I already did some repairing on the phone myself, so I am comfortable dissassembling it and changing parts. Few months ago I changed the main board because my old one had a broken usb connector, and it worked fine until now.
Any advice would be greatly appreciated!
Thank you in advance!
Best regards,
Konstantin

If I remember right, by default, the maximum auto-brightness is still lower than actual maximum, so if the screen can barely be seen at manual max, it makes sense that the screen is pretty much unviewable with auto on.
Idea:
If you have it installed, boot into Safestrap and see if your brightness is normal.
If not, pull up the diagnostic menu (hold Vol - while powering on iirc, might be Vol - and +).
If your brightness is normal in those, it's probably something gone wonky in Android. If not, your screen backlight might be going and needs replaced. I don't think there's anything on the mainboard that would cause it, aside from the circuitry actually supplying power to the backlight...
Screen replacement actually isn't terrible for the D4, if it comes to that, since it's not fused to the glass (like certain single-piece phones for example...*sideways glance at the S3*).

Hello!
Thank you for your reply!
Effectively something is very wrong with the device. Today I woke up to find it completely unresponsive, had to turn it off by holding the power button for a while. When it turned on again, the whole screen was white with glitchy color lines since the very reboot, and nothing else happens, couldnt even turn it off without unscrewing the battery.
I will put the old main board to see if the other one died.
Thank you again!
Best regards,
Konstantin