Can't upload firmware

[ZShock]

Well, upgraded to a new firmware and crashed, black screen (no light) and detected as ADFU, also. Rode recovery guide, and tried to use the backup firmware, but doesn't work. It says something like "read/write error".

Help T.T

[ZShock]

Ok, I have my MP4 in recovery mode, detected as ADFU. The screen is in black (no light) and isn't detected as hard disk. It's completely DEAD. I set it in recovery mode, but when I try to install the backup firmware it says "read/write error".

Help! T_T