I just finished replacing the LCD/Digitizer assembly on my phone and when it is plugged with a battery it appears to be trying to boot but briefly displays a battery then shuts off. If the battery is out and it is plugged in it flashed the row of buttons once every 3 seconds.
The phone is stock and after the damage it appeared to function fine other than the lcd and digitizer. I could receive calls, texts and play sounds for email and so on.
I've reseated all the connections multiple times and made sure I didn't miss anything in the process. I have no idea what could be wrong. Any help is greatly appreciated.
EDIT:
I was just able to get it into download mode on the second try. On the first try it was flashing the buttons.
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I have a T-mobile vibrant running bionix which has worked without any major issues up until a few minutes ago.
The phone shut itself off (while tethering). When I try to turn the phone on it will not boot.
I get the Vibrant splash screen, then the Team Whiskey animation and then the phone turns itself off.
I tried a different battery, and I also tried with and without the USB power plugged in. Removing/replacing the SIM and MicroSD card do not make a difference.
I got it to boot once with the battery cover removed, but putting the battery cover on made the phone shut off immediately. I have not been able to get it to boot up except for that one time.
The phone can boot to recovery properly, but then it just shuts itself off again.
Does anyone have any idea what is going on?
Sounds like you may have a case of bent contacts. Especially if it boots on when the cover is off but then you put it on and it shuts off. I would look at that first. Doing any hari-cari type battery pulls lately?
I have a little more information to add.
1. It isn't bent contacts. (Or if it is, I can't tell) The battery contacts are all in good shape.
2. It is definitely a physical contact or trace inside the phone. I can get the phone to boot up sometimes if I don't move it around very much. Simply tapping my finger on the back of the phone makes it shut itself off again.
What does that sound like? A power trace? Any help is appreciated.
I took the phone apart again and then reassembled it. Nothing seems to be broken that I can see with my naked eye.
More information:
Applying pressure to the battery (or middle of the phone) doesn't make it turn off.
Applying pressure to the back surface close to the top of the phone where the logic board sits makes it turn itself off instantly. Specifically, where the speaker/ringer is.
I wonder if a new logic board would fix my problem. I have already ordered a new phone (Galaxy Nexus), but I would love to get this one in working order again so that I could sell it or use it as an mp3 player
Hi everyone.
I dropped my phone today, and the screen broke.
The phone still seems to work properly, but the classic signs of a broken LCD are present: purple screen with many many lines and nothing legible.
I have ordered a replacement screen already, but I cannot get the phone to shut down and stay turned off.
Since the screen is broken internally, it does not respond to my touch.
I can hold down the power button for 15 seconds but that does a reset, and the phone automatically turns back on.
Is there anyway to keep the phone off other than by draining the battery completely?
I need to keep it powered down so that I can disassemble it safely.
Any ideas?
Thanks!
whatchamacallit said:
Hi everyone.
I dropped my phone today, and the screen broke.
The phone still seems to work properly, but the classic signs of a broken LCD are present: purple screen with many many lines and nothing legible.
I have ordered a replacement screen already, but I cannot get the phone to shut down and stay turned off.
Since the screen is broken internally, it does not respond to my touch.
I can hold down the power button for 15 seconds but that does a reset, and the phone automatically turns back on.
Is there anyway to keep the phone off other than by draining the battery completely?
I need to keep it powered down so that I can disassemble it safely.
Any ideas?
Thanks!
Click to expand...
Click to collapse
I don't know of any way, but as long as you are careful while disassembling you should be fine. You should be able to pry the screen out enough that you can disconnect the battery before disconnecting the screen. I doubt disconnecting the screen with the phone on would damage anything anyway. I believe people do this iPhone screens all the time to test them.
The first time I've allowed my battery to get very low since installing CM7 on my HTC Merge and I'm now having all sorts of problems.
Firstly my screen won't light up. It's just completely black. The phone is on and the 4 buttons at the bottom light up but that's all. The phone is still responding to my touch as I can load apps and hear noises if I happen to touch the correct parts of the screen. It's almost as if the brightness has been turned way down, but I'm unable to see the controls to try turning it up again. I have tried booting to recovery mode but that doesn't display either.
Secondly the battery won't charge. Since the battery is drained I can only get the phone on when it is plugged in, but the orange "charging" led at the top of the phone never lights up. It just casually flashes like it ordinarily would have done when it was running from the battery. I have two batteries and they're both doing this.
I can't be 100% sure that these problems are due to the installation of CM7 but I've never experienced it before so i'm guessing they're connected.
Does anybody have any suggestions on how I can get my phone working again.
It's also worth mentioning that it is also no longer recognised by my computer
Sounds like a hardware fault, if you have the same issues in recovery as you do in your os then its very unlikely its ROM/software related
I don't your device nor have I taken it apart so its only guesses I could give you on which component needs to be replaced, LCD or flex cable are best guesses
Sent from my Nexus 4 using Tapatalk 2
Want to update on this as I've just had another look at it after a while.
With the battery having completely drained, I connected the phone to charge via my PC and the orange charge light lit up and the phone went into recovery mode without any assistance from me. After about 2 seconds the screen went off again.
When the battery has charged sufficiently, I am once again able to turn the phone on and it boots up... but the screen remains blank.
If I discharge the battery and then plug it into my PC, I am able to repeat the appearance of the recovery screen, but it always vanishes before I am able to do anything.
The screen must be surely be functional or how would I get those 2 seconds of display ?
Does anybody have any ideas of what I can do to get the phone working again?
I acquired a new battery and after fitting it the phone immediately worked again. The battery was completely without charge but the phone charged it up without any problems. However, as soon as the power ran low the same thing happened; the screen has stopped working and the battery doesn't seem to charge anymore.
Alright, I've got a hum-dinger here. I've been running CM12 for some time now, I started noticing much more frequent blue screens due to modem crashes so I wiped and reinstalled the ROM. Now I'm getting a really strange problem where so long as the phone is plugged in to something (charger, or computer) I can use the phone completely normally. The moment I unplug I get 1 of 2 scenarios:
1: the screen immediately goes blank (no power down sequence, no blue screen) and I'm kicked back to LG splash screen which then proceeds to go to the power off state. Attempting to power on again gets as far as the CM12 boot animation and then screen goes blank again. I've tried powering on several times from the stage only to get part way through the boot animation and then kicked back to the black screen.
2: Screen does not immediately go blank, I can swim around the home screens scroll to an app, even start an app - but about 10 seconds into the app the screen suddenly goes blank and I'm back at scenario 1.
The only way to get the phone past the ROM boot animation is to plug it back into something....but then I can't unplug lest I end up back at scenario 1.
The shutdown sequence almost looks like I tanked the battery, but going into the recovery (TWRP) I can see that I actually have a good 98% left.
Thinking CM12 had some issues, I tried another Lollipop ROM (blisspop) and I got the exact same behavior. Thinking Lollipop was still half-baked for this LG I reverted back to a KitKat ROM (CM11) and I got....the exact same behavior.
I tried wiping all the data, system, cache, dalvik, partitions and reinstalling completely from scratch -- but I get the exact same problem. The only thing I haven't tried yet is LGNPST back to 100% stock, but I'm struggling to see what difference that would make as I'm wiping out everything except the recovery between tries.
Anybody have any ideas, thoughts, comments? I'm grasping at straws here.....
You could always try to load the stock rom back on the phone to see if that does anything. Another thing you can try is to power off the phone, plug it up to the charger and see if it charges overnight, however I have a sneaking suspicion that the battery is toast.
Kilogrm, I've left it charging overnight and and am able to carry it around all day without issue doing the occasional glance at the time, but if I try to do anything of significance I will end up at a black screen again, so I'm rather inclined to believe it isn't the battery. I do have a replacement battery that I bought a while back that I never got around to installing....so I could try that.
I'm guessing that if I'm going to install a stock ROM I might as well just LGNPST back to stock....thoughts?
Ok well I used LGNPST to go back to JellyBean Stock, and I got the exact same behavior. I'm thinking it might be a hardware problem, but not sure what.
Well, it was definitely a hardware problem. I opened up the phone and took a look at the rigid-flex board that LG used to connect to the micro-usb jack and I noticed that one of the footprints was missing a component. I quick look around showed that a small(looked like 0402 size) diode had somehow sheared off at the solder joint and was rolling around in the case. I soldered it back on, replaced the battery with the new one I had gotten and closed the phone up. Everything works like a charm again. Now I just have to go back through the root/freeg/rom process again because I flashed all the way back to at&t ROM.
Remove the back cover, remove tiny screws on bottom and pop the cover off. There are another two tiny screws holding the battery connector on the pcb. Unscrew the tiny screws and unplug the battery, then plug in to power. Then unplug, plug battery in and plug power in. Let it charge. This added 8 extra hours on my battery from 15 hours to 24 hours. It appears to be going up too if u drain it to 0 dead and charge to 100 and unplug. Do it over and over again forever and the battery will slowly repair the damage.
Hi there,
Over the years i've done several smart phone repairs, screen replacements, batteries, new cases etc. All of them without any problems. A Few days ago a friend asked me to replace the case and screen of a Huawei P20 lite. Everything went fairly smooth, however after i finished replacing the parts and put the phone back together it does not turn on completely, only the charge light turns red and the phone is vibrating non stop while on charger.
Note: The phone has not been used +- 4 months before repair. When i remove the charger the phone dies again. Sometimes when powering up, the boot animation starts (max 2 sec) but then the screen goes black again (vibrating continues and charging led stays on). The battery was a real pain to get out, so it took some light bending to get it out. Not sure the battery is causing the issue though.
What i've tried:
- Charge the phone with different chargers/cables for 1 hour +
- Charge from low power charger for 4 hours.
- Leave the phone 2 days and try again
- Took it apart again and put it back together, exact same issue.
- Try to start the phone without battery/screen/camera's and other devices that are not mandatory, same issue persists.
- try to get in recovery etc.. no success.
Could anyone help me how to find the culprit of this issue, im really lost.. Any tips are much appreciated.
Thanks in advance!
check batery by multimeter first and if posible use other for test.
take tooth brush and clean all connectors in phone also.
Did u test screen before asembly it ? it was works ?
Hello I have the same problem and I fixed
Dear,
This is solved by changing the sense of the motherboard cable, incredible but True