[Q] G3 Stuck on Firmware update screen . please help.

chelstromj

Member
Jun 17, 2014
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I just got a new LG g3 yesterday. Worked fine for about an hour. Started crashing. Green Screen with crash handler with options to reboot or dump. It would boot up and then crash again. Also received a Kernel crash black screen. So I decided to flash new dll file and tot file using lg flash tool. Put into stock download mode (firmware update Screen) and started flash. Went to 19% the screen went black acted like it turns off and disconnects and fails. Tried 4 different cords with not very different results. the furthest it got was 49%. Now it is stuck in firmware update screen. I remove battery and turn on phone it goes to lg boot screen and then firmware update. If the phone is off and I plug into wall charger the screen shows battery symbol with spinning thing and then firmware update screen comes on. Please help. Thanks for any input in advance.
 
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pbedard

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Jul 30, 2010
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I just got a new LG g3 yesterday. Worked fine for about an hour. Started crashing. Green Screen with crash handler with options to reboot or dump. It would boot up and then crash again. Also received a Kernel crash black screen. So I decided to flash new dll file and tot file using lg flash tool. Put into stock download mode (firmware update Screen) and started flash. Went to 19% the screen went black acted like it turns off and disconnects and fails. Tried 4 different cords with not very different results. the furthest it got was 49%. Now it is stuck in firmware update screen. I remove battery and turn on phone it goes to lg boot screen and then firmware update. If the phone is off and I plug into wall charger the screen shows battery symbol with spinning thing and then firmware update screen comes on. Please help. Thanks for any input in advance.
I had to replace two g3s bad software

Sent from my LGLS990 using XDA Premium HD app
 

chelstromj

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Jun 17, 2014
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got an update on my problem. I re downloaded tot file and dll file and tried again got to 94%. it booted showed android guy for a sec and then booted again and showed miniOS with music looking bars moving up and down and then showed blue screen with Factory reset status and a big red number 2. not 3. help please.

If i try to turn it on it gives me the same thing mini OS and then Factory reset status big red number 2
 

engine95

Recognized Contributor
Oct 14, 2008
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got an update on my problem. I re downloaded tot file and dll file and tried again got to 94%. it booted showed android guy for a sec and then booted again and showed miniOS with music looking bars moving up and down and then showed blue screen with Factory reset status and a big red number 2. not 3. help please.

If i try to turn it on it gives me the same thing mini OS and then Factory reset status big red number 2
This should get you going now. http://forum.xda-developers.com/showthread.php?p=54912191
 
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chelstromj

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Jun 17, 2014
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Still problems

I'm getting to different crash screens now. A green one that say Demigod crash handler:tz and a black screen about a kernal crash. Any ideas on these issues?
 

engine95

Recognized Contributor
Oct 14, 2008
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I'm getting to different crash screens now. A green one that say Demigod crash handler:tz and a black screen about a kernal crash. Any ideas on these issues?
Both those screens are kernel issues. They were common with the granddad of this phone... Optimus G.
You should just reboot and be good. If not, then maybe you need to run Flashtool again.
I'm not a fan of Flashtool. But I guess our other option, LGNPST, isn't an option anymore.
Other than that, maybe go with the above post.
 
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chelstromj

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Jun 17, 2014
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Both those screens are kernel issues. They were common with the granddad of this phone... Optimus G.
You should just reboot and be good. If not, then maybe you need to run Flashtool again.
I'm not a fan of Flashtool. But I guess our other option, LGNPST, isn't an option anymore.
Other than that, maybe go with the above post.
Lg and sprint are telling me they will not take it back without proof of purchase. I bought it off a local person. Their upgrade that they wanted cash for instead of using. It was sealed supposedly unused. Sprint store said that the demigod one means its been rooted and can not help me. I am very frustrated and know just enough about this stuff to only get in trouble.

Is there more i can Flash? Or more Software I can replace to get rid of the issue. As I have flashed tot file and dll file 30 or so times. With no better result. I don't want a $500 paper weight. Thanks for all the help so far.
 

engine95

Recognized Contributor
Oct 14, 2008
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Lg and sprint are telling me they will not take it back without proof of purchase. I bought it off a local person. Their upgrade that they wanted cash for instead of using. It was sealed supposedly unused. Sprint store said that the demigod one means its been rooted and can not help me. I am very frustrated and know just enough about this stuff to only get in trouble.

Is there more i can Flash? Or more Software I can replace to get rid of the issue. As I have flashed tot file and dll file 30 or so times. With no better result. I don't want a $500 paper weight. Thanks for all the help so far.
The Demigod happens even when not rooted if I remember right. I think Sprint was just being lazy.
Go to that thread I linked earlier by fergie, and grab both dll's. Generic and Sprint.
I know you don't want to do it again but it's your only way to hopefully get it working.
I'll see if I can get an md5sum for the tot to make sure you have it right. I'll post it here in a minute.

Edit: md5sum for LS990ZV4_04.51101.tot - 8cee4b3dd55ec6405d03805bc1061459
I know its worked for me a few times. And both dll's should work just fine.
 
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chelstromj

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Jun 17, 2014
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The Demigod happens even when not rooted if I remember right. I think Sprint was just being lazy.
Go to that thread I linked earlier by fergie, and grab both dll's. Generic and Sprint.
I know you don't want to do it again but it's your only way to hopefully get it working.
I'll see if I can get an md5sum for the tot to make sure you have it right. I'll post it here in a minute.

Edit: md5sum for LS990ZV4_04.51101.tot - 8cee4b3dd55ec6405d03805bc1061459
I know its worked for me a few times. And both dll's should work just fine.
What would the generic dll do if I have not modified anything?
 

gomezpal

New member
Jun 15, 2010
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same issue

Hello did you ever get it fixed ? i have the exact same problem. I was able to talk to lg today and im going to send it in for service . They said they dont need proof of purchase since the phone is only a couple of months old so its still under warranty please let me know if you have any info that can help me before i send it in.
 

oakwood24

New member
Jul 13, 2016
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i have a lg optimus l90 and i took my battery out for literally 1 minute and then put in back in and started charging it. it turned back on with a black screen saying "firmware update do not unplug the USB connection until the process is complete" its been like this for about 5minutes now and its still at 0%. can someone please tell me what to do? help!
 
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