Hi everyone, the above mentioned laptop does not respond to the power switch. I noticed that Q47 (in picture) was overheating and the KBC (KB3940Q-A1) was warming up so I changed both but they are still behaving the same way. I only have schematic for Rev:1a which does not include Q47. 3v and 5v are present. Any help will be appreciated.

Without the schematics is very complicated but maybe you will be able to find the problem applying voltage on the main lines after remove the KBC and the Q47 .

Good Luck