Fixing a Revo - Black Screen - LG Revolution

Hey all. I am attempting to fix my buddy's phone. Looked through the forum but couldn't find anything similar. What happens is whenever I power the phone on, the LG splash screen comes on then goes to a black screen. It stays on the black screen until I pull the battery. Tried taking SD out and different key combinations, same result.
It happened all of a sudden, didn't drop it or expose it to radiation or any ridiculous stuff. I'm well-versed in HTC phones and both the old and new Samsung phones (SW Upgrade and Odin) but LG is foreign to me.
The phone was not rooted. It was in a carry-on bag during a flight, worked at the first airport, failed to start at the second. Thanks in advance!
Sent from my SPH-M900 using xda premium

Related

Time for a new phone?

So in the middle of the day, I pulled my phone out of my pocket to check the time. I was faced with a black, backlit screen. It'd turn off and back on every 5 seconds or so. I pulled the battery, attempted to turn it on, but I was faced with the same black, backlit screen. It continued the cycle.
I tried powering it on in bootloader mode. This caused the backlight to stay on continuously, but again, nothing on the screen. No M logo, not even a faint hint of text.
Is this phone done for?
It may be possible that it is just the screen, however I do not have the phone to look at it. If you plug it in when it is powered on do you get a recognized device on windows/linux?
The wires connecting the LCD screen could also be loose. If you are at all tech savy you might try taking it apart and looking at it.
The Droid is an amazing phone, but it is getting outdated pretty fast. I still use the Moto Droid and have no problems.
Do you have the insurance with Asurion? if so you can send it in and they charge like $50 to replace the phone.
xslntx said:
So in the middle of the day, I pulled my phone out of my pocket to check the time. I was faced with a black, backlit screen. It'd turn off and back on every 5 seconds or so. I pulled the battery, attempted to turn it on, but I was faced with the same black, backlit screen. It continued the cycle.
I tried powering it on in bootloader mode. This caused the backlight to stay on continuously, but again, nothing on the screen. No M logo, not even a faint hint of text.
Is this phone done for?
Click to expand...
Click to collapse
I would contact the manufacturer/carrier if there is still a warranty. If not, I would still contact to see if there is anything they can recommend, or if they will fix it for a minimal fee. Otherwise, look up how to take apart your milestone/droid on these forums and check for a loose connection or something. If all else fails, you may be able to buy a replacement screen. Those are the steps I would follow, but contact motorola/carrier first no matter what.
Good luck.

[Q] Phone works, screen does not yet sometimes it does

Hello
One night I was using the phone without doing anything special , some video watching . Phone went dark, tried to reboot. Blank Screen and the capacitive buttons flash. Left it to charge all night, in the morning it started but after I pressed the lock button blank screen but phone still working and receiving input.
Took the battery and SD card out left it for 30 seconds then started it again, Stuck at LG logo. Repeat , phone started ... Pressed lock button once then again to unlock , screen wouldn't start.
Used LG Mobile Update recovery tool to restore it ... Didn't solve problem. Sometimes it does not even start , just flashes buttons, other times it does without screen and last all works even the screen until first time goes dark , in the last two cases I can use LG On-Screen Phone without trouble, in doing so I installed a proximity sensor test app to see if it was causing my screen to not come back on , the sensor looked fine.
Facts:
1. Two day old Optimus Black p970, worked like a charm until stated problem
2. The app that checked proximity sensor showed the sensor to be free when my hand wasn't on it
3. The warranty laws in my country are idiotic so I would do or buy anything rather than send it so they can give me a new one in 3 months.
4. Tried another battery from another Optimus, fully charged nothing different.
5. Stock rom.
Do any of you fine people have some ideas on how to fix this? Thanks in advance
Hi there...
Sometime ago [1 year and a half or so~] I worked at a cell refurbishing facility [there were samsung, motorola and palm devices from sprint] and that problem you have was quite usual. Blank screen, still the phone is somehow usable like reciving calls...
There's this thing called "flex" which is the connector between board and display and that is what we fix, most of the time not even "fix it" just getting it in the right place...
This happen because of excesive use in those sliding or clamshell devices, in OB could be for overheating, you could try to fix it yourself or pay $20 usd [that's what it cost here]
Would that connector explain the fact that sometimes it doesn't start at all? hmm I am thinking now and I guess if it moves and somehow the phone feels it has not display connected it could fail to start... Anyhow thank you
actually yes, it could be only for the flex [some devices don't start at all when not having display or keyboard if there's any] but since our OB is not sliding nor clamshell type probably was overheating.
you say you have stock rom, well now I'm using CM7 but when I was at stock and after using the phone a few minutes it felt warm and some more minutes [like playing gunbros where you need to use both hands and a lot of movement] it was really hot and had to stop playing for a while.
what I'm trying to say is that because of overheating flex could have moved, but because of overheating too may have move something else, you couldn't belive the huge number of micro-things that reside in the board.
so if it's only the flex, it's an easy task to do, just unplug and plug again, but if it's something else it's quite hard to know just looking at it, you need to do some electric measures and stuff, the recomendation is to take it to a tech center or something
Hi. I Have same issue. Two times when i press power buton, butons flashing and screen still black. Phone not responding. I must remove baterry.
Sent from my LG-P970 using Tapatalk
Hi there, got the same problem too with my optimus black. Screen goes flickering, shut down don't do any good, and the phone temperature is kinda hot. But in my case it work after I clean some cache and data in the phone storage through LG OSP. After that, the phone temperature back to normal and the phone screen back to normal also. I believe that in my case the phone is overheated.

LCD Screen replacement

Thought this was going to be an easy repair. Obtained a new screen from Repair Universe (Really quick). Followed the video and several take apart guides. Put the phone back together, turned it on, Get the Motorola Logo screen, bottom keys light up and then the screen goes blank, Have to pull the battery to shut it down. SO, I put the old screen back in, turned it on, Motorola Logo again and the then the screen dims to where you can hardly see what's there, but it goes through the boot process. Anybody have any ideas as to what the hell I did to screw it up? Swapped the screens around several times hoping I'd remember something and magic would happen but no such luck!! Thanks, Howie
Replacing the Bionic's LCD is one of the simplest phone repairs I've ever done. It's possible you got a faulty screen, or it's possible that the LCD is not your problem. I've purchased from them a few times but never had a problem...might want to check what their return policy is.
Yeah, plug and play! Should have taken 30 minutes tops? What has me puzzled is the old screen dims right out now so I screwed something up? Sorta hoping this happened to someone else ans they figured it out before I send it in for repair.....
Sent from my ADR6350 using Tapatalk 2
meandg5 said:
Yeah, plug and play! Should have taken 30 minutes tops? What has me puzzled is the old screen dims right out now so I screwed something up? Sorta hoping this happened to someone else ans they figured it out before I send it in for repair.....
Sent from my ADR6350 using Tapatalk 2
Click to expand...
Click to collapse
Couple questions I had which may help clarify a few things, and could help in troubleshooting or finding someone who had a similar problem..
Why are you replacing the screen, was the screen dimming before you tried the replacement or only after?
Are you running stock blur or are you rooted/rom'd?
Information like that can go a long way to diagnosing the actual problems.
It's rooted and it's not a stock rom. I bought the phone and the LCD screen was damaged, so I ordered a replacement. I could still use it with the damaged screen but it had several white lines going down it. I rooted the phone and loaded a different rom before I switched screens and it was fine until I switched lcd's.
Sent from my ADR6350 using Tapatalk 2
It's probably a faulty LCD in that case, as long as the old LCD is working as it was. If not then perhaps you damaged the back light circuit.
The old screen doesn't work anymore. Correctly anyway. The old screen is real dim?
Sent from my ADR6350 using Tapatalk 2
I would have to agree with brandogg, could be the back light that is having the problem and that is why the old broken LCD is going dim now.
I'm assuming that the dimness problem occured only after the install of the replacement LCD since you only mentioned the lines as being the original problem.
One thing you could check is if the auto brightness is enabled. I would disable that and set the brightness as high as it will go and see if you still have the dimness issues.
That's when the dimness started on the old screen, after I installed the new one. I'll try to check the brightness after work. Thanks for the idea. I'll post back.
Sent from my ADR6350 using Tapatalk 2

Screen not working

Hello,
I have sent my gnexus off to be repaired this week and recently started to use my old milestone until my other phone is repaired. Phone was working fine, a little slow to my nexus but it was better than nothing. I was checking my emails and stuck my phone in my pocket to cross the street, when I pulled it out again, the screen would light up (glow) but the screen was black, I tried pulling the battery and rebooting but to no avail. I can feel the phone vibrate when I slide my finger across to unlock it and tap icons, but nothing is being displayed. I'm wondering if anybody else has had something like this happen and if it is possible to fix relatively easily?
If you don't get anything on the screen anymore I'm afraid it's a hardware failure.
Maybe the connector cable is broken (partially), I guess...
I guess Eiertschik is right.
In the boot process, does the M logo show up?

[Q] Screen Replacement Leads to Unbootable Phone

So I recently cracked the screen on my HTC One m7. I bought a replacement screen and front housing. The screen was so far beyond repair that I couldn't shut off the phone prior to starting the replacement. I tried waiting for the phone to die but after two days I became impatient and did it anyway (essentially the phone lost power when I disconnected the battery). After transferring all parts into the new housing and being what I though as diligent putting all parts and connections back in their place, tried to power the phone back on. all that happens is that the back and home buttons flash and then I hear what sounds like the audio for when the phone powers on. The screen stays black and then phone doesn't technically turn on. I know this because I have missed messages and the green led light would be flashing if it was. Therefore, at this point I'm not certain that the new screen works or if I've connected it right. I've tried the numerous boot tricks with the volume buttons, nadda. I have had the phone on a charger for a full day and the same problems. (Disclaimer: I don't have the original charger, but I have been using this one for a long time). I do see the red charging led if I wiggle the charger in the input, but also just recently I saw a green led when doing this, which when the phone was working was a sign that it was fully charged. If anyone has a solution to my problem that would be great. I'm also interested on what's wrong, why this is happening, what might have caused this behavior? What do the flashing home and back buttons mean?
Howdy,
I've had the same problem, but my phone was shutdown allready. When I replaced the front screen, the phone won't boot. I would like to know if its anyway to get the files from sdcard down?
Thanks for the support!

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