help with dead player

[arealman]

i and my frnd hav exactly the same Mp4 player with only difference that his player supports ebooks and mine didnt. So i extracted his firmware,
repaired it and updated mine. Now wenever i turn on the player a strange
glitched screen comes up. Even the computer does not detect it as a usb
mass storage device.
I have my firmware backup but i cannot update my player unless the
computer detects the usb device !!!
Plz help me !!!

[mark04912]

Were they the same make of player not cosmetic but actual board and never flash a firmware that is'not made for your board/ player