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[Fix] [How to] [Unbrick] 'fastboot mode started udc_start() (LG-P500)

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voltaire23
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(Last edited by voltaire23; 15th March 2014 at 01:06 PM.) Reason: Update
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Info 2 [Fix] [How to] [Unbrick] 'fastboot mode started udc_start() (LG-P500)

REMEMBER: DO THIS AT YOUR OWN RISK..DO FOLLOW STEPS SO THAT YOU WONT ENCOUNTER ANY PROBLEMS.!

Thinking that your phone is bricked??
Ever wonder how to get the hell out of the ''Fastboot mode started udc_start()''..??
Worry not.. The help is here.. )


Note: *This usually happens when you flash something and failed.
*Don't worry your device is not fully bricked.. There are many ways to fix this..
*Before proceeding please make sure your phone is charged even if the backlight is always on while charging..
* Remember make sure LG UNITED (Driver of your phone) is already installed (to avoid PHONE WAS NOT FOUND)!!!!!!
*This will restore your Original Rom.
*This Works On All Variants Of Optimus One (LG-P500,LG-P505,LG-P506,LG-P509) and other few devices
*For the Prerequisites (Below)..

Prerequisites:
*KDZ Updater/Lg United
*Windows Pc/Usb cable


INSTRUCTIONS:
STEP 1:Download the prerequisites. Disable all LGE modems under modems from Windows device manager in
the control panel.. (Simply click start then type ''Device manager'' click it. then you will see there under MODEMS)

STEP 2:Exract the files..Open the KDZ Folder to your desktop and Right click on the "KDZ_FW_UPD.exe" and
click RUN AS ADMINISTRATOR.

STEP 3:Open the "Original firmware" folder and run it, type the serial number on the blank form entry. You can
Find you serial number on the back of you phone, remove the battery and look for the sticker attached to you phone.
If you fail to launch this software, you will have to install net. framework 4.0, just open your browser and type
NET.framework 4.0. Download it and install. After this you are able to run the software.After you type down the serial
number of your device click save and just save it on you DESKTOP. Wait until it is finished. This takes some time.
Internet connection needed as this software is downloading the ''KDZ file'' needed for the "KDZ_FW_UPD.exe".

STEP 4: Now lets go to your phone,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
The phone should light up and say Emergency mode!! in a GREEN/YELLOW background. (if not don't continue...)

STEP 5:After the download lets go back to "KDZ_FW_UPD.exe" .. Follow this settings... TYPE:3GQCT
PHONE MODE: DIAG
Select the cab file (the one you downloaded ''KDZ file'' located at DESKTOP) The version
will depend on the ''KDZ file'' you downloaded. EX: (mine is V10F_00.kdz so the version will be V10F_00) after this
click "LAUNCH SOFTWARE UPDATE'' THIS WILL TAKE SOME TIME..... WAIT FOR IT....
For most of you it would probably say PHONE WAS NOT FOUND!..To avoid this please make sure you have
follow my note written above..

STEP 6:DONE... ITS ALL FIX NOW.. YOUR PHONE WILL REBOOT NORMALLY WITHOUT THE
'FASTBOOT MODE STARTED UDC_START()'

STEP 7:AND FINALLY.... ONE MORE STEP.... PRESS THE "THANK" BUTTON IF I HELPED YOU .

CREDITS:
@XDA DEVELOPERS For the awesome ''original lg firmware'' !! )
Attached Files
File Type: rar Prerequisite.rar - [Click for QR Code] (2.71 MB, 753 views)
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shinobisoft
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First, this method should work for all Optimus One variants. P500, P505, P506, P509, and a few others

Second, a couple corrections, if you don't mind...

Step 3: ... type down the serial number... This is incorrect. This should be IMEI number. IMEI and Serial are two different things.

Step 4: ... Emergency mode!! in a green background... Emergency mode has a Yellow background and "Emergency Mode" printed on the screen in Red.


Third,
When something goes wrong, the device will first attempt to boot to recovery. If it can't boot to recovery for whatever reason, then the device will reboot to fastboot mode. From here there are other options, not just KDZ. KDZ should be the last line of defense as it has bricked many Optimus One's and it's variants. If the device drivers had been previously installed correctly to a Windows PC, then fastboot.exe or any GUI tool for fastboot.exe can flash a recovery that can then be used to repair/replace the device's OS. Linux/Unix users don't need drivers to communicate with USB devices, only a 51-android.rules file and a fastboot executable for Linux/Unix.

Don't take what I've said the wrong way. I'm not trying to shoot your guide down. This is the kind of activity that is encouraged at XDA not discouraged I just wanted to inform you that there are other options.

"The way is known to all but not all know it"





My Devices, Mods, and Tools
 

Device: LG Optimus L9 LG-P769 ( ROOTED, Bootloader.LOCKED ), CWM 6.0.1.2 ( L9RecoveryInstaller ), Stock JB 4.1.2
Device: LG Optimus T LG-P509 ( ROOTED, Bootloader.UNLOCKED ), CWM 5.0.2.7 Touch, CM10
Device: Samsung Galaxy Tab 2 GT-P3113 ( ROOTED, Bootloader.UNLOCKED ), CWM 6.0.4.5, CM11 KitKat

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karan.scorpion
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Thanks a lot. You really saved my phone. Worked like a charm. My device is back to life and working good

But some apps (play store, maps, etc) are shown as broken as I had earlier moved them to a second partition on my SD card.

I tried downloading play store apk, maps apk and tried to install, but installation is a failure

Is there any way to restore these apps?
 
voltaire23
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(Last edited by voltaire23; 17th January 2014 at 05:30 PM.)
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Quote:
Originally Posted by karan.scorpion View Post
Thanks a lot. You really saved my phone. Worked like a charm. My device is back to life and working good

But some apps (play store, maps, etc) are shown as broken as I had earlier moved them to a second partition on my SD card.

I tried downloading play store apk, maps apk and tried to install, but installation is a failure

Is there any way to restore these apps?
hmm..did you try wipe data and wipe cache partition and re install g-apps??
 
voltaire23
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Quote:
Originally Posted by shinobisoft View Post
First, this method should work for all Optimus One variants. P500, P505, P506, P509, and a few others

Second, a couple corrections, if you don't mind...

Step 3: ... type down the serial number... This is incorrect. This should be IMEI number. IMEI and Serial are two different things.

Step 4: ... Emergency mode!! in a green background... Emergency mode has a Yellow background and "Emergency Mode" printed on the screen in Red.


Third,
When something goes wrong, the device will first attempt to boot to recovery. If it can't boot to recovery for whatever reason, then the device will reboot to fastboot mode. From here there are other options, not just KDZ. KDZ should be the last line of defense as it has bricked many Optimus One's and it's variants. If the device drivers had been previously installed correctly to a Windows PC, then fastboot.exe or any GUI tool for fastboot.exe can flash a recovery that can then be used to repair/replace the device's OS. Linux/Unix users don't need drivers to communicate with USB devices, only a 51-android.rules file and a fastboot executable for Linux/Unix.

Don't take what I've said the wrong way. I'm not trying to shoot your guide down. This is the kind of activity that is encouraged at XDA not discouraged I just wanted to inform you that there are other options.
Thanks for the corrections sir. its alright.. my mistake sir..
 
andeedee
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Default Serial number

Hi there, I'm a complete novice at this but giving it a go...I'm up to step three and have opened the original firmware folder and run the application, but whenever I type the serial number (or the IMEI number - have tried both) and hit "save" it says "Unsuccessful in connecting to server or phone information is wrong!"

Any tips to get through this step?

Thanks
 
apvm
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Quote:
Originally Posted by andeedee View Post
Hi there, I'm a complete novice at this but giving it a go...I'm up to step three and have opened the original firmware folder and run the application, but whenever I type the serial number (or the IMEI number - have tried both) and hit "save" it says "Unsuccessful in connecting to server or phone information is wrong!"

Any tips to get through this step?

Thanks
Is it the same IMEI number behind the battery?
 
andeedee
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Quote:
Originally Posted by apvm View Post
Is it the same IMEI number behind the battery?
Hi. Yes it is the one one the LG sticker under the battery. I have tried it with the hyphens and without, and have tried the phone model as P500 and P500h.
Thanks
 
Gianlucafabris
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It work with the rom 4.4?
 
andeedee
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Quote:
Originally Posted by Gianlucafabris View Post
It work with the rom 4.4?
It is running Android 2.3.3 (is that what you were asking?)

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