Thank you GetFlash!!! you rock!, I tried almost every firmware on the list and couldn't get my mp4 working, with some firmwares I had to recover it from dead with a short circuit in the memory.
I have a mp4 like this MP4 DIGITAL PLAYER FT-221
, the board id is : MP-763C-SL V1.1 DATE: 6/12/05 , with a SAMSUNG 607 K9K8G08U0M (1GB) memory and main chip ATJ2085W.
I found and followed your instructions, first I flashed the full firmware and got my mp4 recognized like a removable disk without format and blue screen. Then I tried to flash the dump but i got some errors like " no device conected" so I formatted the memory with the mp4 utility, and then tried again to flash the dump and finally worked!!! Now I have my mp4 working with 3.5.37 firmware which is faster than the old one and I think the sound quality improved a lot too!!!, now I have more bass on my songs
Just for you to know, never disconnect the drive from the USB port while the screen is on with the "transfer logo" on, that was how my mp4 got ******** but thanks to GetFlash it's back again, faster and better!