[Q] P768 doesnt enter in fastboot mode - LG Optimus L9 P760, P765, P768, P769

Hi all
I cant put my phone in fastboot mode, i followed this http://forum.xda-developers.com/showthread.php?t=2292828, i have this drivers installed in my PC (win7 x86):
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This is what start.bat (running as administrator) returns:
ECHO está desativado.
Plug USB cable
wait 4 seconds and put battery back in.
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: 0x4
Checksum Subblock: 0x15
CHIP: 4430
IDEN: 425afbd4255ce3d82e21d8edb5e373ccda19c374
MPKH: 5f4092eccddf90fa43f546adf89508b31b9c74795e9516194c0ea6412fdcb7f6
CRC0: 9c669ad9
CRC1: 682adccf
sending 2ndstage to target... f0030002
usb_write 4
usb_write 4
wait 5-lelelel...
[*] msg size = 4
usb_write 21552
[*] data size = 21552
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 = 246272
usb_write 4
usb_write 246272
** Done **
Microsoft Windows [versão 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. Todos os direitos reservados.
C:\Users\Emerson\Desktop\fastboot\yours>
I followed the steps: removed battery, ran start.bat. Then i selected [1] for fastboot, pressed enter, plug my phone without battery, wait 4 sec. and re-insert the battery, but the phone just dont boot into fastboot mode, it stays off. If i remove battery and turn it on, it boots the android normally.
Am i doing something wrong? My model is P768 and im running official JB

---

It looks like your phone entered fastboot mode, just type fastboot devices and you should see serial#

---

shucrut said:
Hi all
I cant put my phone in fastboot mode, i followed this http://forum.xda-developers.com/showthread.php?t=2292828, i have this drivers installed in my PC (win7 x86):
View attachment 2142302
This is what start.bat (running as administrator) returns:
ECHO está desativado.
Plug USB cable
wait 4 seconds and put battery back in.
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: 0x4
Checksum Subblock: 0x15
CHIP: 4430
IDEN: 425afbd4255ce3d82e21d8edb5e373ccda19c374
MPKH: 5f4092eccddf90fa43f546adf89508b31b9c74795e9516194c0ea6412fdcb7f6
CRC0: 9c669ad9
CRC1: 682adccf
sending 2ndstage to target... f0030002
usb_write 4
usb_write 4
wait 5-lelelel...
[*] msg size = 4
usb_write 21552
[*] data size = 21552
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 = 246272
usb_write 4
usb_write 246272
** Done **
Microsoft Windows [versão 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. Todos os direitos reservados.
C:\Users\Emerson\Desktop\fastboot\yours>
I followed the steps: removed battery, ran start.bat. Then i selected [1] for fastboot, pressed enter, plug my phone without battery, wait 4 sec. and re-insert the battery, but the phone just dont boot into fastboot mode, it stays off. If i remove battery and turn it on, it boots the android normally.
Am i doing something wrong? My model is P768 and im running official JB
Click to expand...
Click to collapse
Did you enable your computer speaker? If so you should heard use connection sound after you connect usb to phone. And after wait 4 seconds you should heard that sound again after re-insert battery back. For P768 phone screen stay black in fastboot mode. If you want to test if your phone is in fastboot mode please enter this command.
> fastboot devices
Output should be
XXXXXXXXXXXXX fastboot
If no output or sound please try other usb port or reinstall fastboot driver.

---

Lelus said:
It looks like your phone entered fastboot mode, just type fastboot device and you should see serial#
Click to expand...
Click to collapse
But at this point i should be able to see something like this:
http://dl.xda-developers.com/attach...3/0/9/SHOWING_OPTION_TO_UNLOCK_BOOTLOADER.jpg
Or am i wrong?

---

shucrut said:
But at this point i should be able to see something like this:
http://dl.xda-developers.com/attach...3/0/9/SHOWING_OPTION_TO_UNLOCK_BOOTLOADER.jpg
Or am i wrong?
Click to expand...
Click to collapse
You'll see that with native fastboot and only on l9 models that allow bootloader unlocking. Btw What are you trying to do ?

---

Lelus said:
You'll see that with native fastboot and only on l9 models that allow bootloader unlocking. Btw What are you trying to do ?
Click to expand...
Click to collapse
Im trying to unlock bootloader, but in this mode the phone screen remains black, i cant tell if phone is turned on or not

---

artit said:
Did you enable your computer speaker? If so you should heard use connection sound after you connect usb to phone. And after wait 4 seconds you should heard that sound again after re-insert battery back. For P768 phone screen stay black in fastboot mode. If you want to test if your phone is in fastboot mode please enter this command.
> fastboot devices
Output should be
XXXXXXXXXXXXX fastboot
If no output or sound please try other usb port or reinstall fastboot driver.
Click to expand...
Click to collapse
Oh ok, im gonna try it right now and report back. And yes, i heard the sound when inserted the battery back.
EDIT: fastboot recognized my device. So that means i can now follow this tutorial http://forum.xda-developers.com/showthread.php?t=2196808 to unlock my bootloader and be able to install CWM and root my phone right?

---

shucrut said:
Oh ok, im gonna try it right now and report back. And yes, i heard the sound when inserted the battery back.
EDIT: fastboot recognized my device. So that means i can now follow this tutorial http://forum.xda-developers.com/showthread.php?t=2196808 to unlock my bootloader and be able to install CWM and root my phone right?
Click to expand...
Click to collapse
If your phone is P768 you should follow this http://forum.xda-developers.com/showthread.php?t=2313794