Post Reply

[HOW TO] Unbrick LG Optimus One P500 from fastboot mode started udc_start()..

OP ganesh3s3

30th March 2011, 06:56 PM   |  #1  
OP Junior Member
Flag Cuddalore
Thanks Meter: 71
 
26 posts
Join Date:Joined: Feb 2011
More
If you did something like install custom recovery on your lg optimus one and failed, you would get a black screen saying..

fastboot mode started
udc_start()


If this happens...


Relax.. Your phone is not bricked.. There are many ways to fix it... This method of unbricking should be done as a last resort because it erases all your data...

Charge your phone before proceeding even if the backlight is always on while charging..

Things required:
Kdz updater:
http://forum.xda-developers.com/show...05&postcount=1
Stock ROM:
http://forum.xda-developers.com/showthread.php?t=865479
USB cable, Windows PC with administrator account,LG united mobile drivers(google for it if you don't find it in the "Add or remove programs" window in the control panel)..

First disable all LGE modems under modems from Windows device manager in the Control Panel..

Make sure you have LG united mobile drivers installed.. Or just google for it..

Then press and hold both the back(return) button and the volume up button and simultaneously connect the USB cable..

The phone should light up and say Emergency mode!! in a green background.. If it goes to Emergency mode, it can be fixed... If it doesn't I'm sorry, search for an other forum or give it to the LG service center...

Now decompress the 7z file you downloaded using WinZip, WinRar etc., install msxml.msi from the uncompressed directory and run KDZ_FW_UPD.exe (With administrator rights by right clicking and selecting run as administrator).
In the dialog box, select Type : 3GQCT and PhoneMode: DIAG, select the kdz file and flash the stock ROM... It would take about 15 minutes.. If the kdz updater crashes, change compatibility mode or restart the computer and phone or do something till it works (Retry retry retry)...

For most of you it would probably say PHONE WAS NOT FOUND!.... If so, then follow all the steps said above, but this time, shake the life out of your phone after connecting the USB till the lines "PHONE WAS NOT FOUND!" stops appearing... If it does appear again retry for endless times or restart the computer or check if any modem drivers are active or try it in an another computer...

From here on, follow any one choice:

Choice 1:
[B]Note:[B] There is a fat chance for this choice to not work and for you to go back to the very first line of this thread...
If you want your phone to have all the data before you bricked it, just disconnect the USB when the phone shows the charge screen as if you are charging the phone while it is switched off.. (This was discovered accidentally by me so try it at your own risk ) After disconnecting try to power on the normal way and it should work and the phone should be like it was never bricked.. If it doesn't boot, retry flashing from the start.. If it starts and all your data is restored root it, install titanium backup and backup all your apps and data and save the contents of sdcard\titaniumbackup to your pc.. Then copy all you want in your sdcard to your pc.. Then redo all the steps without disconnecting till the kdz flasher says FINISHED.. This is because if you disconnect the usb in the middle, only half the rom would be installed which is unstable.. After installing the full rom, root it, and install titanium backup and copy all the copied content back to sdcard\titaniumbackup and restore them using titanium backup.. That's it..

Choice 2:
If you do not want the data and if you need to do a risk-free unbrick, then flash with the kdz updater and wait till it says FINISHED.. That's it..

Now that you know how to unbrick, try installing what bricked your phone again but this time in the correct way... GOOD LUCK...

AND FINALLY.... ONE MORE STEP.... PRESS THE "THANK" BUTTON IF I HELPED YOU IN ANY WAY...
Last edited by ganesh3s3; 12th November 2011 at 05:00 PM.
The Following 67 Users Say Thank You to ganesh3s3 For This Useful Post: [ View ]
30th March 2011, 08:54 PM   |  #2  
Senior Member
Thanks Meter: 4
 
102 posts
Join Date:Joined: Jul 2009
where do you get kdz?
31st March 2011, 05:16 AM   |  #3  
OP Junior Member
Flag Cuddalore
Thanks Meter: 71
 
26 posts
Join Date:Joined: Feb 2011
More
Quote:
Originally Posted by ljohnson1981

where do you get kdz?

Links have been included...
1st April 2011, 09:44 AM   |  #4  
maxupload's Avatar
Member
Flag abudhabi
Thanks Meter: 0
 
68 posts
Join Date:Joined: Jun 2008
More
Quote:
Originally Posted by ganesh3s3

If you did something like install custom recovery on your lg optimus one and failed, you would get a black screen saying..

fastboot mode started
udc_start()

If this happens...


Relax.. Your phone is not bricked.. There is a way to fix it...

First disable lg modem from windows device manager..

Make sure you have lg universal driver installed.. Or just google for it..

Charge your phone before proceeding even if the backlight is always on..

Things required:
Kdz updater:
forum.xda-developers.com/showpost.php?p=8651505&postcount=1
Stock rom:
forum.xda-developers.com/showthread.php?t=865479
Usb cable, windows pc

Then press and hold both the back(return) button and the volume up button and simultaneously connect the usb cable..

The phone should light up and say Emergency mode!! in a green background..

Then decompress the 7z, install msxml.msi from the uncompressed directory and run KDZ_FW_UPD.exe (Has administrator).
Select Type : 3GQCT and flash the stock rom... It would take about 15 minutes.. If the kdz updater crashes, change compatibility mode or restart or do something till it works...

If you want your phone to have all the data before you bricked it, just disconnect the usb when the phone shows the charge screen as if you are charging the phone while it is switched off.. (This was discovered accidentally by me so try it at your own risk) After disconnecting try to power on the normal way and it should work and the phone should be like it was never bricked.. If it doesn't boot retry flashing from the start.. If it starts and all your data is restored root it, install titanium backup and backup all your apps and data and save the contents of sdcard\titaniumbackup to your pc.. Then copy all you want in your sdcard to your pc.. Then redo all the steps without disconnecting till the kdz flasher says FINISHED.. This is because if you disconnect the usb in the middle, only half the rom would be installed which is unstable.. After installing the full rom, root it, and install titanium backup and copy all the copied content back to sdcard\titaniumbackup and restore them using titanium backup.. That's it..

If you do not want the data and if you need to do a riskfree unbrick, then flash with the kdz updater and wait till it says FINISHED.. That's it..

Now that you know how to unbrick it, try installing what bricked your phone again but in the correct way... GOOD LUCK...

THANK ME IF I HELPED YOU...

i tried this but got msg:

[R&D Test Tools Log File]

12:20:25 : Launching SW update
12:20:25 : Unpacking KDZ
12:20:31 : KDZ file extraced
12:20:32 : Files were extracted.
12:20:32 : LGMobileDL Load.
12:20:32 : Port = 3
12:20:32 : Connecting to phone
12:20:37 : PHONE WAS NOT FOUND!
12:20:39 : ===FINISHED===
what to do????? i am using xp64....... what do you mean by (Has administrator).
Please help or i to go LG service center???
Thanks in advance
3rd April 2011, 08:08 AM   |  #5  
OP Junior Member
Flag Cuddalore
Thanks Meter: 71
 
26 posts
Join Date:Joined: Feb 2011
More
Quote:
Originally Posted by maxupload

i tried this but got msg:

[R&D Test Tools Log File]

12:20:25 : Launching SW update
12:20:25 : Unpacking KDZ
12:20:31 : KDZ file extraced
12:20:32 : Files were extracted.
12:20:32 : LGMobileDL Load.
12:20:32 : Port = 3
12:20:32 : Connecting to phone
12:20:37 : PHONE WAS NOT FOUND!
12:20:39 : ===FINISHED===
what to do????? i am using xp64....... what do you mean by (Has administrator).
Please help or i to go LG service center???
Thanks in advance

By (has administrator) I meant to run kdz with administrator user account rights..

And for your phone not found problem, did you uninstall everything that I listed? If so then you should shake the phone more vigorously from plugging your phone to usb till the phone is found, seriously. If it is still not found, review if you have followed my instructions without leaving a single one out and retry till you suceed... Best of luck... Any more help.. Ask me.
The Following User Says Thank You to ganesh3s3 For This Useful Post: [ View ]
6th April 2011, 08:40 AM   |  #6  
maxupload's Avatar
Member
Flag abudhabi
Thanks Meter: 0
 
68 posts
Join Date:Joined: Jun 2008
More
Quote:
Originally Posted by ganesh3s3

By (has administrator) I meant to run kdz with administrator user account rights..

And for your phone not found problem, did you uninstall everything that I listed? If so then you should shake the phone more vigorously from plugging your phone to usb till the phone is found, seriously. If it is still not found, review if you have followed my instructions without leaving a single one out and retry till you suceed... Best of luck... Any more help.. Ask me.

when i try to run updater as administrator in winxp 64 it is asking for password ??? i didint set any password...and default user have administrator right without any password....what to do.....bit tense please help me out..... please
7th April 2011, 03:44 PM   |  #7  
OP Junior Member
Flag Cuddalore
Thanks Meter: 71
 
26 posts
Join Date:Joined: Feb 2011
More
Quote:
Originally Posted by maxupload

when i try to run updater as administrator in winxp 64 it is asking for password ??? i didint set any password...and default user have administrator right without any password....what to do.....bit tense please help me out..... please

Ok if you can't run it as an administrator try skipping that step and try connecting your phone without admin till your is found.. Try SHAKING...

If it doesn't work.. Take your phone and equipment to your friends home which has admin rights...try till you suceed because it usually is a painfree process.. You can fix your phone if it goes to emergency mode... Dont worry.. feel free to ask for help...
17th April 2011, 04:34 AM   |  #8  
Junior Member
Flag Phnom Penh
Thanks Meter: 0
 
1 posts
Join Date:Joined: Apr 2011
Donate to Me
More
Thumbs down Did my P500 Dead?
Hi there,


I had LG P500 with firmware 2.2.1 10e. And The 2.2.1 cannot be root. So i down it to 2.2 and 10b indian. And I use thunderg....recovery from xda. And then i update it vai recovery by applying update.zip and finally i had 2.3.1. It work great but the camera not work, So i decided to down to 2.2 but while i update using kdz updater It just running to param : 36....it stop and show upgrade error. While my phone in emergency mode i removed battery and open it back. It just show Lg logo and at the moment all my home...back...button light was always blink , it just keep at lg logo screen!!! ....




. Too much sorry for my English cuz it not my native i come from Cambodia. And too much much and more thank if you could help me.
18th April 2011, 05:29 AM   |  #9  
OP Junior Member
Flag Cuddalore
Thanks Meter: 71
 
26 posts
Join Date:Joined: Feb 2011
More
Quote:
Originally Posted by SmartLCN

Hi there,


I had LG P500 with firmware 2.2.1 10e. And The 2.2.1 cannot be root. So i down it to 2.2 and 10b indian. And I use thunderg....recovery from xda. And then i update it vai recovery by applying update.zip and finally i had 2.3.1. It work great but the camera not work, So i decided to down to 2.2 but while i update using kdz updater It just running to param : 36....it stop and show upgrade error. While my phone in emergency mode i removed battery and open it back. It just show Lg logo and at the moment all my home...back...button light was always blink , it just keep at lg logo screen!!! ....




. Too much sorry for my English cuz it not my native i come from Cambodia. And too much much and more thank if you could help me.

Try my above method again and again and if it doesn't work try an another firmware or on an another computer... If nothing works then stick with the 2.3 if you can boot into recovery...
18th April 2011, 08:00 PM   |  #10  
Junior Member
Thanks Meter: 0
 
2 posts
Join Date:Joined: Apr 2011
LG P500 does not care
Hello everybody I'm new to the portal, I had tried to update my phone, he was given an error now will not turn anyone knows how to help me I thank you


hug

Post Reply Subscribe to Thread

Tags
brick, fastboot, optimus, p500, unbrick
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Top Threads in Questions and Answers by ThreadRank