My Player is Dead .. Please help me.

[mashranga]

i buy a mp4 some days ago. after some days i faced some trouble. When i play the player it become restart. Once it restart and did not start again. A white screen come in the display. Then i use the firmware Full_Firmware_3.5.37v2.1b_FM to recover my player keeping the backup of my old farmware. Then my player became alive and i reload the old one and play well.
But after some days the same problem began.
now in my player there only white screen . My pc can find it as a ADFU device and i can still install the farmware Full_Firmware_3.5.37v2.1b_FM to my player.
But my pc can not find it (Get as ADFU device).

Now what can i do to alive my player??

I opened the played and find the text ...

samsung 619
k9f4G08U0A
PCB0

Some one please help me???????

[arviverona]

does the computer still recognize as an adfu device..check the pins of the chips ionside your player if there are accidewntally connected by mettalic objects