Dead mp4 ak2117

[limoncete82]

Hi people!
I have a generic mp4 1,8" without internal Memory. When i turn on, the screen shows a sand clock loading all the time.
I don't have a cd driver and i don't know the number of firmware.
The mp4 have 3 chips:

1 - AK2117 SD90FBA C7C
2 - 25052 (don't have nand chip)
3 - RDA5807FP JS353245

Somebody could help me?

Thanks!