Strange issue - LG Optimus L90

My phone is stuck in bootloop. Phone is not getting switched off. When I remove the battery and insert after couple of minutes it gets Switch On automatically and reboots again after CynagogenMod's Logo. I can't enter custom recovery because of it. I tried every button combination but nothing seems to be working. LG L90 ( i changed my battery too ) 2 phones with same issue .. i dont know how to fix it.. i thought its power button issue .. even i gave service center too .. that center service man also checked and said power button is good only then he told i too dont know the problem.. i got confused.. cant find exactly what is the prob is .
Any solutions?

Try this below.
https://forum.xda-developers.com/lg-l90/general/guide-flash-stock-kdz-offline-lg-l90-t2803479

Related

[Q] Bricked? Or dead? Please help...

Hi, I wonder if anyone can help me.
I have an Incredible S with Virtuous Quattro installed. I did that 3 weeks ago. Since then I experienced 4 freezes and the buttons (although working) didn't light up at all or just flickered. But this is not the problem, I just mention this in case it is relevant.
I put the phone last night on the charger and realized this morning that the screen was frozen again, I removed the battery and reinserted it. The phone seems to start (vibrates and when connected to the PC it also tells me it loads the driver) but nothing else happens. No screen output at all. I tried now umpteen times, removed battery and tried to press power button whilst holding the vol up button, all to no avail.
Do you have any idea?
Try volume down + power ..
aditya. said:
Try volume down + power ..
Click to expand...
Click to collapse
Tried that but phone doesn't react at all, doesn't even vibrate as it does when pressing vol up + power or power alone :crying:
But thanks for getting back!
Is ADB working? You can't enter the bootloader?
Some have had success leaving the battery out for a while, and then putting it back in and turning it on
Not saying it WILL work, just a suggestion
And I'll try not to scare you, but it is actually is possible that you fried your eMMC chip pulling your battery Seems to have happened a few times on Desire S and Incredible S :/
markj338 said:
Is ADB working? You can't enter the bootloader?
Some have had success leaving the battery out for a while, and then putting it back in and turning it on
Not saying it WILL work, just a suggestion
And I'll try not to scare you, but it is actually is possible that you fried your eMMC chip pulling your battery Seems to have happened a few times on Desire S and Incredible S :/
Click to expand...
Click to collapse
Thanks for that, I think the latter is what happened, the phone just doesn't do anything. I think it is time to bin it and to get something else
marco21st said:
Thanks for that, I think the latter is what happened, the phone just doesn't do anything. I think it is time to bin it and to get something else
Click to expand...
Click to collapse
Before you bin it, perhaps take it to HTC and tell them it has stopped working, and that it happened when you were charging (which is true)
If they can't turn it on, they can't see it is s-off
and will replace the motherboard
IMHO doing a battery pull at the wrong time is all you did mate, its HTC's fault for using faulty eMMC chips. Doing a battery pull is not voiding warranty as AFAIK
Is it under warranty? If it is, then its worth a try instead of binning a $300 phone with one fried chip
Had the Same issue gave it to hTC they Gave me any entire new Incredible s
Thanks guys, I will give this a go.
I do have the same problem now , its not under warranty , any other way to fix it :crying:
Same but different
Well I have the same issue but only slightly different. I can't access the bootloader nor the recovery mode. I don't know why. I'm currently using cyanogen 7.2. At first when I flashed it,everything was fine. Untill one day,my upper screen(status bar) can't seem to respond to my touches. Day after day it just got worst. Till one day,I my IncredibleS just left me a black screen but there were lights on the 4 buttons(home,back key etc.) I tried using the battery pulling method. Sometimes it works,sometime is doesn't. But even so,my bootloader still persist to show up. I'm a S-ON by the way. Any idea how do I solve this? And yes,my warranty has expired last may. :crying::crying:

[Q] a strange problem with power button, PLS HELP!!!

Hi everyone,,
I hope I can tell my problem properly with my poor language!:crying:
my device got a problem in response of the power button, sometimes it does not work and I did use the volume buttons to wake up the screen instead of it!
then one time the device fall down from my hand and the battery pulled out so the phone turned off. I tried to switch it ON but no way because the button became totally not working
I tried every way to make it ON, I unscrewed the devise and I check that the button was not damaged and every thing looks fine.
I tried to use some ways that are mentioned in youtube like unplugging the battery several times and so on.. but still not working.
I took the phone to a service shop in my town and they made an electrical check for the button and it was working well electrically! but they could not doing more with the phone because they don't have spare parts for HTC devices!
after that I expected that this issue is a software problem, because I installed a custom rom recently!
finally I succeeded to make it ON using ADB commands and I changed the rom 2 times, but the power button still not working, then I changed the Kernel, and the problem remains :crying::crying::crying::crying:
so, do you advice me to try anything else?
Please heeeeeeeeelp
i have the same problem
i have the same problem here and i use cmd to reboot :'( but i have a big problem my mobiles keeps on shutting down alone and i restart it by adb but if i am out of home what can i do ? anyune help us
Instal script manager and write a script to do it.
And if you using custom rom write to the author mayby he will change a vendor key for you.
Sent from my HTC One X using xda premium
stona !!
i can't understand what are you writing ? i only need a solution for the shut down problem ?? it keeps on shutting down when i close airplane mode when it's on airplane mode nothng happens so give me a soution plzz what's the problem there ? please help
mo7ammed3adel said:
i can't understand what are you writing ? i only need a solution for the shut down problem ?? it keeps on shutting down when i close airplane mode when it's on airplane mode nothng happens so give me a soution plzz what's the problem there ? please help
Click to expand...
Click to collapse
I was written what you need to make you life easier if you have power button broken. If you have shutdown problem write to developer of rom you're using. Or change it.
Sent from my HTC One X using xda premium

Galaxy note wont turn ON.

Hi, I am using a galaxy Note in India and it is about 14 months old. I was working on internet and it freezes in between, so this time it wont even turn off or give any option when I pressed power button so I took the battery off after about waiting for 10 min. Then I turned it back ON It gave me error Encryption Failed Reset your phone.
I again tried to restart the phone, Still the same error. I again tried to restart and this time it wont even start Nothing happen just a dead screen.
1. Battery charge is full
2. it wont turn on and when pressing vdown + middle button + power button nothing happens just black screen always.
3. Taken the battery off number of times and then also tried, No Luck.
4 Even the computer wont even recognize it.
Its just a Dead Screen no movement in screen tried all possible step No luck , it all happened suddenly.
Its just the same as it came from company (No Root not even opened its just like new phone.)
Not able to understand what can be the issue, Please help..!!!!
Thanks
Ankush
Ankush911 said:
Hi, I am using a galaxy Note in India and it is about 14 months old. I was working on internet and it freezes in between, so this time it wont even turn off or give any option when I pressed power button so I took the battery off after about waiting for 10 min. Then I turned it back ON It gave me error Encryption Failed Reset your phone.
I again tried to restart the phone, Still the same error. I again tried to restart and this time it wont even start Nothing happen just a dead screen.
1. Battery charge is full
2. it wont turn on and when pressing vdown + middle button + power button nothing happens just black screen always.
3. Taken the battery off number of times and then also tried, No Luck.
4 Even the computer wont even recognize it.
Its just a Dead Screen no movement in screen tried all possible step No luck , it all happened suddenly.
Its just the same as it came from company (No Root not even opened its just like new phone.)
Not able to understand what can be the issue, Please help..!!!!
Thanks
Ankush
Click to expand...
Click to collapse
Ankush bhai.. Take it to service centre
Sent from my GT-N7000 using xda app-developers app
salilpune1 said:
Ankush bhai.. Take it to service centre
Sent from my GT-N7000 using xda app-developers app
Click to expand...
Click to collapse
Its not in warranty ...I am just not able to understand that it was working fine and suddenly its all dead..
Ankush911 said:
Its not in warranty ...I am just not able to understand that it was working fine and suddenly its all dead..
Click to expand...
Click to collapse
On which rom u were?
Try vup+home+power
Sent from my GT-N7000 using xda app-developers app
How are you sure that the battery is good and charged. Normally after one year if the usage is heavy, the chances of battery down happens. So make sure battery is good. Secondly you mentioned volume down button, how about vol up button ie recovery mode?
Sent from my GT-N7000 using xda premium
dsmas said:
How are you sure that the battery is good and charged. Normally after one year if the usage is heavy, the chances of battery down happens. So make sure battery is good. Secondly you mentioned volume down button, how about vol up button ie recovery mode?
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
Yes The battery is fine and fully charged I tried another Note's battery : No Luck
I tried pressing Vol up button as well with the combination : No Luck in that as well.
Got encryption failed error for two time in start up after that its all dead..No luck
I dont know about the ROM its same as it came from samsung..
Not able to understand what can be wrong.
Today, this sudden happen to me. But, my m devices cannot be turn on, charge but screen didnt turn on at all. Did u succesful fix ur device?
looks like u need to replaced a new motherboard.. it looks like SDS syndrome to me.
jasonkhoo87 said:
Today, this sudden happen to me. But, my m devices cannot be turn on, charge but screen didnt turn on at all. Did u succesful fix ur device?
Click to expand...
Click to collapse
This happened to me as well last week. Tried everything but failed.
I did below steps and my phone is up & working
1) Remove the battery and keep it in a dry place for 4-6 hours (Very important step to make this work)
2) Place the battery back into computer and do not turn ON the phone
3) Plug the phone to wall charger and charge the phone for at least an Hour (I kept for 2 Hrs)
4) Remove the charger and gently press the power button for 15 secs
5) This should turn the phone back ON
Above steps helped for me. Let me know if this worked for you also :angel:
Regards,
Israr
---------- Post added at 08:10 PM ---------- Previous post was at 08:04 PM ----------
Ankush911 said:
Hi, I am using a galaxy Note in India and it is about 14 months old. I was working on internet and it freezes in between, so this time it wont even turn off or give any option when I pressed power button so I took the battery off after about waiting for 10 min. Then I turned it back ON It gave me error Encryption Failed Reset your phone.
I again tried to restart the phone, Still the same error. I again tried to restart and this time it wont even start Nothing happen just a dead screen.
1. Battery charge is full
2. it wont turn on and when pressing vdown + middle button + power button nothing happens just black screen always.
3. Taken the battery off number of times and then also tried, No Luck.
4 Even the computer wont even recognize it.
Its just a Dead Screen no movement in screen tried all possible step No luck , it all happened suddenly.
Its just the same as it came from company (No Root not even opened its just like new phone.)
Not able to understand what can be the issue, Please help..!!!!
Thanks
Ankush
Click to expand...
Click to collapse
-------------------------------------------------------------------------------------------------------------------------
Ankush,
In your case I can think of only 2 things
1) If you have CWM installed then
press and hold "Volume UP Key + Power Key + Home Key" all together for 30 secs (may be a min) and see if you get recovery screen
If yes then all is ok & you just need to flash a new ROM
2) If you do not have CWM then
press and hold "Volume Down Key + Power Key + Home Key" all together for 30 secs (may be a min) and see if you get a custom screen
If yes then you can install custom ROM (or original ROM) using ODIN.
Let me know if anything helps you here
Regards,
Israr
khanisrar said:
This happened to me as well last week. Tried everything but failed.
I did below steps and my phone is up & working
1) Remove the battery and keep it in a dry place for 4-6 hours (Very important step to make this work)
2) Place the battery back into computer and do not turn ON the phone
3) Plug the phone to wall charger and charge the phone for at least an Hour (I kept for 2 Hrs)
4) Remove the charger and gently press the power button for 15 secs
5) This should turn the phone back ON
Above steps helped for me. Let me know if this worked for you also :angel:
Regards,
Israr
Click to expand...
Click to collapse
This step kinda weird.. Since I my note never get wet. I hope it will work.. I tried it later.. I dont have much budget to upgadet to Note 3 now. :crying:
Same kind of error
Over the night my phone closed. When I try to open it, on the screen apeared "Insert PIN to decrypt your ~something~ ". I never encrypted my phone so I tried to restart. I got stuck on the samsung logo. Then I removed the battery and put it back in and my device never started again. I have 2 batteries and none of them worked. I can charge the batteries independently and this is not the issue.
sebastost said:
Over the night my phone closed. When I try to open it, on the screen apeared "Insert PIN to decrypt your ~something~ ". I never encrypted my phone so I tried to restart. I got stuck on the samsung logo. Then I removed the battery and put it back in and my device never started again. I have 2 batteries and none of them worked. I can charge the batteries independently and this is not the issue.
Click to expand...
Click to collapse
Have the same problem right now.. did you find a solution eventually?
Same happened to my device today. Had trouble with some apps before. Wanted to play back a two days old backup. But my phone never woke up again. Shut down forever. Never got to recovery. Had the latest cm11 nightly. Now its dead! RIP. My dear friend. We've gone a long way together. Never intended to replace you anytime soon. But I can't be without a Phone. Moving on to Galaxy S5 now. Hope it can fill the gapp.
Same here, completely dead after a reboot. I took it apart but I see no damage or signs of burn damage anywhere on the motherboard or other components. Is there anything I can do to troubleshoot and find out specifically what happened?
i am not sure, mayb the phone is design to last for only certain years, new apps launch make the phone in applicable for be running with latest apps and everything. Or mayb the phone is design with a timer to self destroy its chip or component after specific numbers of days being used??

Xperia Z C6603 is dead! Help!

Hi , after searching around the forum still i dont understand what happend with my phone. The phone is 1 month old. Earlier today when i tryed to charge my phone (after some time charging) i saw the red light blinking and the phone wouldnt start so i did a reset (power button + volume up) , phone restarted and it worked very good , later after couple of hours i tryed to put the phone back to charge , i didnt pay atention so i was kinda trying to insert usb in the phone in a wrong way then i insert it corectly and when i looked at phone i saw hes off (i didnt look to see if anything happened to it when i tryed to insert usb wrong way , i did that before and it was no problem). I tryed to reset again , tryed both tools from sony , tryed mostly everything the phone its just dead no sign of life. When this happened phone was like 60% battery and ive updated like 1 week ago via SUS to 4.4.2. I heard one method with the tape and im trying it right now maybe if battery gets to 0 phone will reset by itself but i dont have much hope on it.
My phone is rooted but i didnt touch bootloader , its my warranty ok? Any other ideas how i could repair it or if the phone just broken or its only maybe something from software?
Thanks and best regards!
NEWS , my phone is up again!
What i did was unlogic but ill tell maybe it will help somebody else.
First time i tryed everything i saw on web , pressing all combination with power button and volume buttons and nothing was happening. (as you see the post above).
Second i tryed to tape the power button and volume up button (i used some papaer to protect the phone from the the tape), ive let them for about 1 hour or so , i tryed to reset/power nothing happend.
After that i tryed to see if the phone is charging , nothing happend ... then i simply pressed power button and the phone was back alive (the usb cable was removed). My phone came back with 63% battery , it was like around the same when it went dead. Everything seems to work fine now!
Any idea on this? I want to avoid this in the future
Thanks!
izyeasy said:
NEWS , my phone is up again!
What i did was unlogic but ill tell maybe it will help somebody else.
First time i tryed everything i saw on web , pressing all combination with power button and volume buttons and nothing was happening. (as you see the post above).
Second i tryed to tape the power button and volume up button (i used some papaer to protect the phone from the the tape), ive let them for about 1 hour or so , i tryed to reset/power nothing happend.
After that i tryed to see if the phone is charging , nothing happend ... then i simply pressed power button and the phone was back alive (the usb cable was removed). My phone came back with 63% battery , it was like around the same when it went dead. Everything seems to work fine now!
Any idea on this? I want to avoid this in the future
Click to expand...
Click to collapse
I had a pretty much same problem too. I used to flash roms on HTC phones and this restart thing (volume up + power) was new to me! Thanks for posting!
izyeasy said:
Hi , after searching around the forum still i dont understand what happend with my phone. The phone is 1 month old. Earlier today when i tryed to charge my phone (after some time charging) i saw the red light blinking and the phone wouldnt start so i did a reset (power button + volume up) , phone restarted and it worked very good , later after couple of hours i tryed to put the phone back to charge , i didnt pay atention so i was kinda trying to insert usb in the phone in a wrong way then i insert it corectly and when i looked at phone i saw hes off (i didnt look to see if anything happened to it when i tryed to insert usb wrong way , i did that before and it was no problem). I tryed to reset again , tryed both tools from sony , tryed mostly everything the phone its just dead no sign of life. When this happened phone was like 60% battery and ive updated like 1 week ago via SUS to 4.4.2. I heard one method with the tape and im trying it right now maybe if battery gets to 0 phone will reset by itself but i dont have much hope on it.
My phone is rooted but i didnt touch bootloader , its my warranty ok? Any other ideas how i could repair it or if the phone just broken or its only maybe something from software?
Thanks and best regards!
Click to expand...
Click to collapse
flash the. ftf of ur device via Flashtool..
DastanShaikh said:
flash the. ftf of ur device via Flashtool..
Click to expand...
Click to collapse
it was impossible the phone was dead
izyeasy said:
it was impossible the phone was dead
Click to expand...
Click to collapse
what happens when u press power button any sign of life...like vibrate or led blink
DastanShaikh said:
what happens when u press power button any sign of life...like vibrate or led blink
Click to expand...
Click to collapse
see my second post , it just came up before was just dead , no leds no vibration nothing happend anything i was pressing , computer didnt saw the device , but i got lucky i guess
izyeasy said:
see my second post , it just came up before was just dead , no leds no vibration nothing happend anything i was pressing , computer didnt saw the device , but i got lucky i guess
Click to expand...
Click to collapse
oh i didn't saw that...
u can try Emma tool it may recognise the device... Google it..
well if their is no sign of life u may go to service centre and see what they say...

Mi 8 se screen blinking

so today i came home from school and wanted to turn on my wifi .. after pressing the power button the phone display started blinking on and off :/ .. it has no water damage and has never been dropped .. then i did s data wipe :| from the recovery mode . the display is working normally in the recovery mode but when i boot into system the display starts to blink on and off ..
p9_lite said:
so today i came home from school and wanted to turn on my wifi .. after pressing the power button the phone display started blinking on and off :/ .. it has no water damage and has never been dropped .. then i did s data wipe :| from the recovery mode . the display is working normally in the recovery mode but when i boot into system the display starts to blink on and off ..
Click to expand...
Click to collapse
i think u need to do a factory reset
sound like a firmware problem
what firmware are u on
Mine does some blinks when i'm getting in or out of the always on screen display mode, but not everytime. got it in more than 1 rom.
I don't have such issues on my SE.
[/COLOR]Dang it. I'm experiencing the same issue for the past few days with my Global ver. Mi8.
Any solutions?
Change to default theme
black187 said:
Change to default theme
Click to expand...
Click to collapse
This
Installed "dark mod" miui theme today and this resulted in a white strobe light screen after the first unlock attempt... No way to stop it's or access anything.
Slight panic since I'd seen threads about this issue and assumed it's hardware problem
Only way to stop it was a forced power off by long press of the power button.
Luckily on next boot the screen was working and I was able to Uninstall the theme again
Just when I was about to go to the service centre today, my phone becomes normal. Not sure why though.
How about you guys phone?
Trande said:
Just when I was about to go to the service centre today, my phone becomes normal. Not sure why though.
How about you guys phone?
Click to expand...
Click to collapse
And the problem has reappeared? I have had the same problem and from one day to the next it has been "fixed". I was going to process the guarantee ...
Trande said:
Just when I was about to go to the service centre today, my phone becomes normal. Not sure why though.
How about you guys phone?
Click to expand...
Click to collapse
The issue is with the theme, remove it and u'll be Gucci.

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