[LG Optimus 3D] xbsall:
[YOUTUBE]JmvCpR45LKA[/YOUTUBE]

Original Thread:

This guide will repair most of P920/SU760 devices that have been flashed with wrong ROM packages and cannot enter DOWNLOAD MODE anymore.

If something doesn't work for you make a post describing exactly what you did , your phone model and your operating system.

Before making pointless posts READ THE GUIDE.

If you don't know how to make one of the recovery programs work READ THEIR GUIDE .

You can find links in the end of this post.

PREPARATION

This guide requires that you have installed correct LG DRIVERS and you have a working NORMAL LG USB CABLE also you need to do this with a good battery.

PROCEDURE

Before you start READ THE GUIDE once so you can understand it and then proceed with repair.

Step1.

Install LGflashtool (also copy/paste crack)

P920 users should run LG FlashTool and load BOOTV21E_AP.bin (ONLY THE AP.BIN FILE) and keep it open but NOT ready for flashing.

SU760 users should run LG FlashTool and load SU760V10GROM (ONLY THE AP.BIN FILE) and keep it open but NOT ready for flashing.

Step 2.

Extract WKPARKS omap4boot and follow installation steps:

Install OMAP4430 USB driver

After driver installation ends remove usb cable BUT keep windows device manager open.

Step 3. Run start_fastboot.bat and select option 2

Step 4. Pull out battery

Step 5. Hold Vol+

Step 6. Connect USB cable, the usbboot will start

Step 7. Insert battery while the usbboot is waiting

Step 8. Script tells you to remove cable but i dont think it's necessary in this version

Step 9. Release Vol+ and look in your Windows Device manager

If everything worked ok your phone got recognised and now you are in downoad mode.

Step 10. Change LG USB Serial Port according to LG FlashTool Guide to port 41.

Step 11. Remove cable and battery from P920/SU760

Step 12. Set LG FlashTool ready for flashing.

Step 13. Run Steps 3-9 again and you will see your phone being flashed from LG FlashTool.

It will be stopped at 26-30% because phone will turn off on its own BUT the next time you try to enter NORMAL DOWNLOAD MODE it will be available again.

Step 14. Set LG FlashTool ready to flash your P920 with BOOTV21E_AP.bin again.

SU760 users should use SU760V10GROM bin .

Step 15. Put your phone in DOWNLOAD MODE without using omap4boot this time.

Step 16. LG FlashTool will recognise the phone and flash it completely this time.

P920 after reboot will go to CWM. You can flash your personal backup or reboot to STOCK V21E.

Step 17. After repairing your P920/SU760 YOU PROBABLY HAVE TO FIX YOUR IMEI...(and maybe your wifi mac address) follow these steps:

Extra Step for P920 User's

After procedure ends use the rebooter utility and select option 2 like below..

Info:
This utility will not work if you don't have Omap Drivers installed

Select task:
1. Flash ICS FastbootLoaders+Recovery
2. Flash V21E Loaders+Recovery
x. Exit
----------------------------------------

Please select 1,2 or exit(x): 2

Ready to Flash V21E+recovery

waiting for OMAP44xx device...

Device descriptor:
bLength = 18
bDescriptorType = 1
bcdUSB = 528
bDeviceClass = 255
bDeviceSubClass = 255
bDeviceProtocol = 255
bMaxPacketSize0 = 64
idVendor = 451
idProduct = D00F
bcdDevice = 0
iManufacturer = 33
iProduct = 37
iSerialNumber = 0
bNumConfigurations = 1
reading ASIC ID
usb_write 4
usb_read 81

[*] read 0 bytes
NumOfSubblocks: 0x5
Subblock ID: 0x1
Subblock Size: 0x5
CH enabled: 0x7
ROM revision: 0x3
Checksum Subblock: 0x15
CHIP: 4430
IDEN: 40a11fbe08c36fb34f6a113fc2516c63395c7947
MPKH: 5f4092eccddf90fa43f546adf89508b31b9c74795e9516194c0ea6412fdcb7f6
CRC0: 0983f41c
CRC1: 139c4f4f
sending 2ndstage to target... f0030002
usb_write 4
usb_write 4

wait 5-seconds...

[*] msg size = 4
usb_write 21504

[*] data size = 21504
usb_close

Reopen usb...

Device descriptor:
bLength = 18
bDescriptorType = 1
bcdUSB = 528
bDeviceClass = 255
bDeviceSubClass = 255
bDeviceProtocol = 255
bMaxPacketSize0 = 64
idVendor = 451
idProduct = D00F
bcdDevice = 0
iManufacturer = 33
iProduct = 37
iSerialNumber = 0
bNumConfigurations = 1
waiting for 2ndstage response...
usb_read 4
usb read = aabbccdd
accepted 2ndstage response
sending image to target...
size = 232512
usb_write 4
usb_write 232512
** Done **
< waiting for device >
sending 'recovery' (5854 KB)...
OKAY [ 3.012s]
writing 'recovery'...
OKAY [ 1.230s]
finished. total time: 4.252s
sending 'u-boot' (512 KB)...
OKAY [ 0.268s]
writing 'u-boot'...
OKAY [ 0.355s]
finished. total time: 0.627s
sending 'x-loader' (128 KB)...
OKAY [ 0.070s]
writing 'x-loader'...
OKAY [ 0.051s]
finished. total time: 0.127s

Loaders have been flashed.
Your P920 is ready to boot into GB again. Reboot.

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

GOOD LUCK and lets get those bricks fixed. :cool:

TROUBLESHOOTING

If you get this screen on P920/SU760 you are in FASTBOOT MODE.

If you get messages like this you probably have a BAD CABLE.

Other Guides that you should read in order to help you restore your P920/SU760:

adixtra ◘►◘►[FLASH + ROMS][v20B.KDZ] KDZ Files on WINDOWS 7 (64) & XP + Download◄◘◄◘

pandaball's [GUIDE] Recovering from brick/bootloop

marti701 LG [TUTORIAL] Flash BIN rom, Unbrick, Update - Optimus 3d (Service Flash software)

The Dark Lestat's [GUIDES/TOOLS]Making Developing/Flashing/Returning to Stock Easier

josuelopezv*[URL="http://xdaforums.com/sh