Hello.
It is not so easy... 1. - If you have it in warrancy -> GIVE IT BACK TO SELLER
2. If not.. you have to follow the Dead Player Recovery guide here:
http://mympxplayer.org/dead-player-r...ide-vt567.html
BUT SKIP THE PART WITH UPLOADING FULL FIRMWARE !
READ ALL ARTICLES HERE TO Make a basic knowledge before destroying your mp4
Good luck