Need help in restoring my Hifiman HM601 4Gb slim

[Pavel_Len]

Hello.

I apologize in advance for my English is not my forte. Google Translate is my friend.

I have a problem with Hifiman HM601 4Gb slim:
1. He does not respond to the power button.
2. When connecting to a computer, i see the only one hidden partition. (20 MB partition just not - does not appear in any circumstances. 80 MB (or 60) partition and partition data is displayed normally when connected via USB) 
3. Recovery through RK27DM_Repair_tool_for_Rockchip_2706 not work.
4. Tried to restore from backup made ​​from another device using WinHex, not helped.  :'(

I would be grateful for any ideas. Thnks

Screens and attach backup files

20 MB partition http://us.ua/1340214/ or rar http://us.ua/1340216/
80 MB partition http://us.ua/1340215/ or rar http://us.ua/1340219/

http://us.ua/1340226/