Hi everyone!
My player is iPod nano clon & it is dead.
It doesn't identify by Windows.
I short memory pins - nothing.
Then I do next:
I short by screwdriver pins 1 & 2 (image 1)
Perhaps you can use other pins.
Windows identify my player as unknown USB device.
Note: Windows identify player ONLY when you short pins, so hold screwdriver.
Then I load firmware into player & it began to work.
Perhaps this can help someone.

Image1 -
http://eqwelibrium.narod.ru/File0052.JPG - 0.05Mb
(You must push on
http://eqwelibrium.narod.ru/File0052.JPG in next window)