DELL Inspiron N7010

MB: DAUM9BMB6D0 REV: D
CHIPSET: BD82HM57
GPU: 216-0774007
MIO: IT8502E

The notebook came, there was no picture on screen (no video). I reballed the GPU and I got video OK. On of the 3,5mm connectors was damaged so I decided to change it with new one. When I exchanged it, the motherboard won't turn on at all. There are no PGOOD voltages. I changed IT8502E, and audio chip, and flashed both BIOS chips, but still I don't have PGOOD voltages.

Standby controller is RT8206B and I get VCC and VIN voltages (5V and 19V).

What else do you recommend me to do?