Help with reflashing NAND - some worked... but maybe not the whole thing? What next?

[Trexbob]

Hi, Have the usual no image transmission, actually no camera response at all (no pictures/movie, no log files generated on MicroSD card). All voltages tested fine on gimbal top board. I tried to re-flash NAND using the method on the thread: No image transmission signal - P3P

Here is the output of the flasher program:

-----------------------------------------------------
TI Serial Flasher Host Program for DM36x
(C) 2009, Texas Instruments, Inc.
Ver. 1.50
-----------------------------------------------------
Flashing NAND with ubl1.img and u-boot.img.
Attempting to connect to device COM8...
Press any key to end this program at any time.
Waiting for the DM36x...
Target: BOOTME
BOOTME commmand received. Returning ACK and header...
ACK command sent. Waiting for BEGIN command...
Target: BEGIN
BEGIN commmand received. Sending CRC table...
100% [ ]
CRC table sent....
Waiting for DONE...
Target: DONE
DONE received. Sending the UBL...
100% [ ]
UBL sent....
Target: DONE
DONE received. UBL was accepted.
UBL transmitted successfully.
Waiting for SFT on the DM36x...
Target: BOOTME
Target: BOOTME
Target: BOOTME
Target: BOOTME
Target: BOOTME

...etc - Ctrl-Ced it at this point after a minute.

Anyone able to point me where to go from here? Do I need a new NAND?

Thanks,
Robert

Edited to fix grammar

 

[crash1sttime]

Did you follow my guide below?

Ive had about a 60% success on repairing these units and looking at your output the NAND is faulty, this can be caused by severe overheating or damage to the ribbon cable.

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[Trexbob]

Thanks, crash1sttime. I am going to get a new cable and try that first, then if I have to, find a new NAND.

 

[quaddamage]

How did you confirmed that DM365 is the issue?

 

[Trexbob]

Was just working on this. I actually did get the NAND to reflash, after using the -nanderase command. I also went from an unpowered to a powered USB. The flash program loaded img, etc, says it flashed ok, so disconnected and hooked all back up. Still no camera response. There is no LED indication at all on the gimbal top board, with or without and SD card, and I have a proper 12.0V to the board, so according to the flow chart, the Ambarella chip or board itself is at fault? Going to go back through the long thread and re-read, I know there's a way people were accessing Ambarella...

 

[quaddamage]

Ambarella has its own UART pads, you can connect there to see if it spits out anything.
There's a tool `ambausb` for flashing it, some people claim successful reflash on action cameras with the same chip (A9).
But I never had a board with dead ambarella, so never flashed that.