What's wrong with my C905?

- It does not turn on.
- When I connect it to the charger or pc, it vibrates and the keypad lights on. It also makes that unpluging sound when I disconnect it from the computer.
- Nothing happens on the screen.
- Holding "C" does not work with SEUS and A2Uploader so I have to use 2+5.
- SEUS says that there is no newer firmware.
- SE pc suite recognizes it, but always on Mass Storage mode.
- I've tryed to flash with main and fs but nothing changed.
- I've repaired its EROM/SEMC Boot with Ultimate Unlocker but nothing changed.

Please help me solving this problem...