Help MP4 1´8" Dead =(

[Pedritto]

The first thing, to excuse my English badly spoken =(. Good, it so happens that buy a MP4 in eBay to the user disubs, the case, the batery did not function, it tapeworm hours and hours charging, disconnected it, it on and al instant was put out, and gave me for bringing up to date to have if said error was solved, but not, died. My MP4 is identic to this



The firmware that carried when I arrive was the version 9.1.51 ¿there is some way to recover it putting the version
9.0.50 or related? =(

Flash Memory Samsung
K9LAG08U0M
PCB0

Processor
ACU715

The computer recognizes the device. And the MP3 Tools, leaves me to install firmware in the device. But the screen always remains white.

If someone can respond in Spanish, genial. If he is in English also.

Thanks beforehand