A while ago my LG Q6 turned off since the battery was drained, the phone was turned on when this happened. After charging it again and trying to turn it back on, it wouldn't turn on. All it does, is vibrate and show nothing on-screen. After about 20-30 seconds, it vibrates again in a constant loop. I have tried entering both recovery and fastboot, both to no prevail. The only sign of life, is when I plug it into the charger with the battery removed. This will show the battery icon with a question mark, which means the screen is fine. Is there any way to fix this issue or am I boned?
you may able to fix with SALT or if you find prog_emmc_firehose_8940_lg.mbn signed for LG you can use edl tool to access raw partitions. there is maybe a way to boot modified kernel that gives you root access, so you can try to decrypt and backup userdata from adb shell.
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My phone is rooted with stock rom. The only changes are listed below
Froze bloat that was safe
changed bootanimation to stock samsung
replaced some apps with inverted versions of themselves (ex. google +, stock messaging)
Here goes:
I was using navigation and I noticed that my phone was off after I had finished. Nothing worked at all, I could not boot into recovery or download. I connected the phone to a charger and red led flashes and an empty battery appears. The battery was full. I could reboot the phone while on the charger, but it would shut off as soon as it got to the homescreen. While off, If I pressed the home button, the green battery would appear as if it were charging. From here I could boot into recovery and download mode. The phone will only boot into these modes while connected to the charger. Here is where it went bad. I attempted to restore a backup while the phone was on the car charger and my car charger got pulled out in the middle of a restore. No charger meant that the phone shut off mid restore. Now, when I plug in the phone, the red led appears and the empty battery with a circle inside appears and then goes away. This repeats itself over and over and the phone buzzes when the empty battery reappears. I can still boot into download mode but not recovery. If I try to flash the stock samsung rom via odin, it says that it passes, however upon automatic reboot the samsung appears and nothing else. After the samsung appears the phone just continues to buzz every 5 seconds or so as if it is trying to do something. Could it be a bootloop? I have done a ton of searching here and now I am resorting to help! Your time is appreciated and beers on me if you can help me get my phone back to normal.
What Rom/kernel were you using before this happened? If custom, which one?
I have another thread a few posts down with the same topic. I am going to delete this one. I was stock rom and kernel. For some reason the phone will not recognize the battery. I tried a new one at verizon and the same thing. I can now boot into both recovery and download mode when connected to the charger , but the phone shuts off as soon as it boots and shows an empty battery with a circle in the middle. Sometimes it does not make it through the verizon boot animation and sometimes it makes it all the way to the homescreen and I can make a few selections before it turns off. After flashing the stock kernel and rom in odin I believe i am completely stock, however I do not want to chance sending the phone into Verizon. I believe that I saw a thread before this happened to me talking about having to calibrate the battery in some way and it had an item to flash in order to fix the problem. I can not find it now. Any ideas? Now that I can access recovery is there anything else that can be done? Why won't the phone recognize that it has a battery? As soon as I pull it off the charger it shuts off. When it is on the charger it appears to be charging and the green in the battery appears to be at about 80% but the level does not move up or down at all. Thank you for your help ahead of time.
I just did a factory data reset yesterday and I was calibrating the battery for the new ROM. When I let the phone die all the way, I left it unplugged for a little while because I was in the middle of a movie. When I got around to plugging it back in, I am getting a flashing LED, no charge indicator, and it won't boot up. Every once in a while, the HTC boot logo will pop up and my phone will vibrate like it's turning on, then it will just go back to the flashing LED. I can get it to jig into fastboot ever so often, but when I try to boot into recovery from there, it just turns off and goes back to the flashing LED. Everything I have read says to hook it up to my computer and use ADB to reboot it, but when I bring up the command prompt, it says that ADB isn't a recognizable action or something like that. My laptop also doesn't recognize my device as being plugged in. I've perused the forums on here and to no avail so here I am asking for help... HELP!?
aretwokay said:
I just did a factory data reset yesterday and I was calibrating the battery for the new ROM. When I let the phone die all the way, I left it unplugged for a little while because I was in the middle of a movie. When I got around to plugging it back in, I am getting a flashing LED, no charge indicator, and it won't boot up. Every once in a while, the HTC boot logo will pop up and my phone will vibrate like it's turning on, then it will just go back to the flashing LED. I can get it to jig into fastboot ever so often, but when I try to boot into recovery from there, it just turns off and goes back to the flashing LED. Everything I have read says to hook it up to my computer and use ADB to reboot it, but when I bring up the command prompt, it says that ADB isn't a recognizable action or something like that. My laptop also doesn't recognize my device as being plugged in. I've perused the forums on here and to no avail so here I am asking for help... HELP!?
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Click to collapse
hve you tried posting this in the htc sensation forum? maybe someone had the same problem...
I just did a factory data reset yesterday and I was calibrating the battery for the new ROM. When I let the phone die all the way, I left it unplugged for a little while because I was in the middle of a movie. When I got around to plugging it back in, I am getting a flashing LED, no charge indicator, and it won't boot up. Every once in a while, the HTC boot logo will pop up and my phone will vibrate like it's turning on, then it will just go back to the flashing LED. I can get it to jig into fastboot ever so often, but when I try to boot into recovery from there, it just turns off and goes back to the flashing LED. Everything I have read says to hook it up to my computer and use ADB to reboot it, but when I bring up the command prompt, it says that ADB isn't a recognizable action or something like that. My laptop also doesn't recognize my device as being plugged in. I've perused the forums on here and to no avail so here I am asking for help... HELP!?
what am I supposed to do in this instance?
matt2k12 said:
what am I supposed to do in this instance?
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Ok when I leave it there to charge after about 5 minutes it tries to boot up again on its own... its like a boot loop but it stays turned off for about 5 mins in between.
Now I believe its officially stuck at the CM logo screen after the data only back up and restore. It stopped turning off which I think was due to battery and when I plugged it into the PC it turned on and has been at the CM logo screen for about an hour now.
It also refuses to boot into recovery now. Stock or Open Recovery. It only shows the green charging LED and when I do a force shut down it blinks on and back on in about 1 second. I have no clue what the deal is. I'm going to try and flash a stock image with RSD Lite and try it all again.
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Your battery is empty. You can't flash anything via fastboot in such state.
When the battery is empty while starting the phone, the bootloader charges it a bit first (that green LED). Only when the battery is charged a little, it switches to boot.
What you want to do is to catch the moment when it starts to boot and hold the volume-up to get to OpenRecovery. OR supports charging so you can let the battery charge more there.
kabaldan said:
Your battery is empty. You can't flash anything via fastboot in such state.
When the battery is empty while starting the phone, the bootloader charges it a bit first (that green LED). Only when the battery is charged a little, it switches to boot.
What you want to do is to catch the moment when it starts to boot and hold the volume-up to get to OpenRecovery. OR supports charging so you can let the battery charge more there.
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Thank you again for your responses.
I was thinking along those lines... But it seems like as soon as it gets a charge that it goes right into the boot logo. There doesn't seem to be any middle ground to go to any recovery mode. I was stuck in a similar situation before but it wasn't constantly trying to boot.
Here is what happened:
When I flashed data only, I selected "reboot after" option so it is constantly trying to do that re-boot but since it cant boot it stays at the CM logo I guess until the phone dies. Then it charges for a while with the green LED and then it tries to boot again. I have tried to access all kinds of recovery and fastboot and everything at the usual intervals and I cant get it to start any recovery mode because it is still following the re-boot command from Open Recovery.
I will keep trying but this time seems different than when I had low battery/no recovery in the past instances. Something is overriding my recovery and I think it has to do with the Open Recovery reboot after flashing command.... I even opened up the back of the phone and disconnected the battery and its still not working.
kabaldan said:
Your battery is empty. You can't flash anything via fastboot in such state.
When the battery is empty while starting the phone, the bootloader charges it a bit first (that green LED). Only when the battery is charged a little, it switches to boot.
What you want to do is to catch the moment when it starts to boot and hold the volume-up to get to OpenRecovery. OR supports charging so you can let the battery charge more there.
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Click to collapse
matt2k12 said:
Thank you again for your responses.
I was thinking along those lines... But it seems like as soon as it gets a charge that it goes right into the boot logo. There doesn't seem to be any middle ground to go to any recovery mode. I was stuck in a similar situation before but it wasn't constantly trying to boot.
Here is what happened:
When I flashed data only, I selected "reboot after" option so it is constantly trying to do that re-boot but since it cant boot it stays at the CM logo I guess until the phone dies. Then it charges for a while with the green LED and then it tries to boot again. I have tried to access all kinds of recovery and fastboot and everything at the usual intervals and I cant get it to start any recovery mode because it is still following the re-boot command from Open Recovery.
I will keep trying but this time seems different than when I had low battery/no recovery in the past instances. Something is overriding my recovery and I think it has to do with the Open Recovery reboot after flashing command.... I even opened up the back of the phone and disconnected the battery and its still not working.
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Click to collapse
I got fastboot working by plugging the phone into a dedicated AC power charger, not one with a USB adapter. Then I let it sit on the boot screen for a couple hours. This way it fully charged the battery and I could bring up fastboot.
What was happening with the USB adapter was that it would try to boot, die, and refuse to go to fastboot, over and over again. I would not have got it working without a dedicated AC power charger.
That literally happened to me a few days ago. Fastboot will say a warning on the screen, somewhere around the middle, "Battery Low" or something along those lines, I paid it no attention, as I knew it was plugged in and should've been charging through my processes. Well, the battery has to be at least 50%+ charged before fastboot will allow any connectivity or communication with ADB or Fastboot on pc. Facepalm.
Always double check battery charge at least 60% or more to be in the safe side, or you risk to soft-brick to even hard-brick your phone.
I have a Pixel 3 that decided to randomly shut off and not turn on anymore. An Android update applied today, all was fine. Battery wasn't low. It warms up when charging, but no other signs of life, nothing on the screen when charging, no status lights, no haptic feedback. I tried holding power for 30+ seconds and nothing happens. I charged it for hours and still nothing.
If I plug it in to my PC it appears in device manager as a Qualcomm com device. I installed the Qualcomm flash utility and I can see the device but that is it. I can't get it to boot to recovery or anything as it simply does not power on in any way. I can't get ADB to recognize it connected and can't boot it to get it into developer mode.
It is in great shape, is treated gently, not sure what went wrong. My wife uses it often for gaming and uses it while charging frequently, maybe it was just too much.
I think I am just screwed, but maybe an image exists that is compatible with the Qualcomm flash utility? I haven't been able to find one, and the image supplied by Google doesn't look to be the right format.