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What is Download mode?
 
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[GUIDE] [P920/5] [SU760] Resurrection Guide (Lets get those brick's fixed...)

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By xbsall, Senior Member on 18th October 2012, 05:19 AM
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Original Thread:
[I]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.
Quote:

You will need to download the following tools.

WKPARKS omap4boot port of SU760/SU870 + u-boot port of SU760/SU870 from here

LGFlashTool(for LGFLASHTOOL Installation guide read this )

RECOVERY ROMS:
P920 users should use BOOTV21E.RAR FROM HERE
(BOOTV21E has all necessary partitions to FULLY REPAIR your P920 with V21E ROM files including CWM TOUCH RECOVERY)

SU760 users should use SU760V10GROM.zip FROM HERE

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
Quote:

If you plug your Phone on PC without battery, OMAP4430 device appeared for seconds and then disappeared in your Windows Device Manager
(check arsen4oo photo guide in post #3)

On windows 7 sometimes OMAP4430 flashes too fast so you cant install driver.
There is a a windows feature that will help you install the driver easier.
To view devices that were once installed but are no longer attached to the computer, open a Command Prompt window using the Run As Administrator option and enter the command:
SET DEVMGR_SHOW_NONPRESENT_DEVICES=1
Then, from the same command prompt, type devmgmt.msc to open Device Manager. Choose View, Show Hidden Devices. The new instance of Device Manager will show “ghosted” entries for devices that were once present. This technique is especially useful for fixing problems caused by leftover drivers after replacing a network card or video card—you can easily delete the ghosted device or update the OMAP4430 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:
Quote:
Originally Posted by josuelopezv

Restoring IMEI
1.Connect phone by USB
2.Activate USB debug mode
3.Enter 3845#*920# in dialer if that doesn’t work try 3845#*925# or 3845#*720# if device is SU760
4.Select Port Settings -> Select CP Image Download
5.A new device should appear at let it install
6.Open Tutty (or hyperterminal) and select serial protocol. Click on open
7.Type AT if response is not OK, change port number (it is possible that when typing you don’t see any letters)
8.Type at%imei, it should display a dummy IMEI
9.Type at%imei=x,x,x,x,x,x,x,x,x,x,x,x,x,x,x where x,x,x... is your orginal IMEI number (found under the battery of your phone). It should response IMEI WRITE OK
10.Reboot phone

If you don't understand how to do this read this thread [GUIDE] Unlock Phone / Recover IMEI

Extra Step for P920 User's
After procedure ends use the rebooter utility and select option 2 like below..

Code:
 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.


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://forum.xda-developers.com/sh
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18th October 2012, 05:28 AM |#2  
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Info 2
MOD Please Sticky this i think this guide should replace the old one IMO
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18th October 2012, 12:20 PM |#3  
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Info 2 A Small Guide if Anyone has troubles installing Omap4430 Driver in Windows 7
When plugging the phone in,find OMAP4430 in "Other Devices" in Device Manager.



Right click on OMAP4430,then click "Update Driver Software..."
Then browse to your omap4boot 1.8 folder that you have extracted from zip



Choose the usb_drv_windows folder and click OK



While installing the driver,ignore any warning messages



After installation finished you will be able to ressurect your phone




Good Luck!
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18th October 2012, 03:15 PM |#4  
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Would this work for the p720 (3d max)?

Because flashing a p920 rom was what originally bricked my p720 in the first place.

Cheers

Sent from my GT-I9300 using xda app-developers app
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18th October 2012, 03:24 PM |#5  
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Quote:
Originally Posted by CptK

Would this work for the p720 (3d max)?

Because flashing a p920 rom was what originally bricked my p720 in the first place.

Cheers

Sent from my GT-I9300 using xda app-developers app

This guide is for p920 and su760...
If omap4boot gets you in download mode get a P720 ROM Bin file and flash it with LG flashtool.
It will probably work.
If you already have the p720 kdz fie but you dont know how to do it start a teamviewer session we will do it together.
Tell me if it works so we can update the guide for P720 too.
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18th October 2012, 05:17 PM |#6  
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Quote:
Originally Posted by xbsall

Tell me if it works so we can update the guide for P720 too.

Sure, I will do when I get home in an hour or so. First I will have to find a p720 rom bin and then I'll let you know how things go.

Sent from my GT-I9300 using xda app-developers app
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18th October 2012, 05:19 PM |#7  
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Extract the bin from kdz with lgextract

Sent from my LG-P920 using xda app-developers app
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18th October 2012, 07:55 PM |#8  
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quick update,

i've extracted the V10A_00.kdb into 8 .bin parts, so im presuming that smartflash is what is going to handle these files.

problem is that OMAP4BOOT is playing up today, it wont connect with GEN_ERROR unexpected 2nd stage respone. this is probably becuase im using windows 8.

im going to run xp on virtualbox now

---------- Post added at 06:55 PM ---------- Previous post was at 06:30 PM ----------

Righto,

xp in virtualbox seems to of done the job



will update this post on a mo with results.
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18th October 2012, 08:10 PM |#9  
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Those 8 files you will make them one with command in cmd: copy /b lg720[*].bin lg720.bin after you get the single bin file use it with flash tool. You also need flashtool DLL file for 720.

Sent from my LG-P920 using xda app-developers app
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18th October 2012, 09:25 PM |#10  
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Quote:
Originally Posted by xbsall

Those 8 files you will make them one with command in cmd: copy /b lg720[*].bin lg720.bin after you get the single bin file use it with flash tool. You also need flashtool DLL file for 720.

Sent from my LG-P920 using xda app-developers app

yea thats a good point, i dont think a flashtool 720 dll exists..

even a su870 cube dll might work
18th October 2012, 09:45 PM |#11  
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OK try the 870 DLL but remember to flash your 720 if it gets fixed and gets into normal download mode with kdz method in the end in order to fix 870 and 720 differences..
or if you cant find any dll try with smartflash tool im sure that you will get it recovered one way or another

Sent from my LG-P920 using xda app-developers app
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