My mp4player Picture is :

Model : Hi-Tech 562
512mb
hand chip : Samsung k9f4g08u0a
pcb0
soc chip : atj2051h
hello
my original firmware was s1mp3 v3.5.37 but i forget backup before flash
i flash my mp4 with incorrect firmware and now i always see a blue screen
i try with many firmware but i always see blue screen
when i connect my mp4 i see only my drive like flash memory

please help me what should i do ?