[LG Optimus L9 P760, P765, P768, P769] David7578:
I have to use the usbboot procedure each time, as when I unplug the usb or wait 2 minutes the device is back to the ON/OFF every 5 seconds sequence in windows.

My guess is that usbboot loads the bins in ram and not in flash. So data is lost after 2 minutes (probably a failsafe timer) or when the usb is unplugged.

Regarding the "fastboot flash recovery recovery.img" command:

I tried that method, but the "remote partition does not exist" error kicks 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: 64c9532ffa2059c1259cb18fa170f2707fa7fdba

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 **

< waiting for device >

sending 'recovery' (5894 KB)...

OKAY [ 3.019s]

writing 'recovery'...

FAILED (remote: partition does not exist)

finished. total time: 3.026s

---------- Post added at 05:03 AM ---------- Previous post was at 04:31 AM ----------

My guess on what happened, is that maybe CM was updating and for some reason the process got stuck right when it was updating the partitions or something. But you can disregard that hypothesis as it's pure speculation on my part for the problem that got me here.

So now, I need to know wether the device is to be trashed or if there's something I can do to get it back to life.

As I wrote earlier, my hunch is that I need the " fastboot oem format " command to work. As of yet, it returns "Failure..." as a message.

And I think it does because I do not have the P760 bins to send with the usbboot command.

I guess the P940 ones are ok to flash a recovery or boot it when the partitions are intact, but when the partitions are not accessible/messed with, it's possible you need the P760 ones for partition related functions to work.

I extracted some img files from the P760 V20D kdz. I wonder if I have the right files in there.

Here's the list:

0-gpt1.img

1-u-boot.img

10-userdata.img

11-cache.img

12-persist.img

13-mlt.img

14-gpt2.img

2-boot.img

3-recovery.img

4-divxkey.img

5-misc.img

6-nv.img

7-fota.img

8-reserved.img

9-system.img

LGP760_V20B_00_CP.fls

Next, I wonder if I can use a µSDcard to put the recovery, boot or even a full image, so that I can work from there and maybe get the internal flash in a usable state again.