Hello,

I solved the problem with this board, it was little wet with coca-cola and after that it stopped powering on.
Due to Cola I had to replace IC PU5 (MAX8734AEE) and IC PU11 (SOT23-5, marking 922BN, part numer G922T12U) had to be replaced.

But I had problem to quickly buy G922T12U working as 8,5V voltage regulator (only available in China, long shipment time)
so I replaced it with LT1761-SD with following modification.

1. I had to cross pins 3 and 5 of LT1761-SD with wires (pin 3 goes to pad 5 on PCB and pin 5 goes to pad 3 on PCB)
2. Resistor PR231 and PR232 stay as they are (59k and 10k)

The original IC (G922T12U) you can also find on other laptop motherboards from Sony: MBX-217 M850, MBX-165 MS91

Use datasheets for details (available in internet).

Cheers
zibi