Hey Dude,
First read the DEAD PLAYER ROCOVERY GUIDE in this forum... then if your player isn t recognised by computer as a mass storage device folow the guide from the 1st step and check the download section for FULL firmware.
After that / or if your player is recognised by your computer as a mass storage device check the download section for a DUMP firmware..
Try them all and remember to first install the full and then the dump... you will probably need reinstall the full if you upload a wrong dump.
And i recomend to try them all more times i found the one i need when i 3 times checked the section allready
AND RESPECT THE DEAD PLAYER RECOVERY GUIDE
good luck