Green light after turning on, and no lights afrerwards

Hi everyone. So i have ps3 slim CECH-3004A and the thing won't start. Red light is on, and when i press button, the console starts light goes green and immediately turns off and there is no light anymore. Things i have tried:

• removed hdd and tried to start without it.
• removed bluray and tried to start without it.
• replaced bluray with another.
• replaced hdd with another, and even format it.
• tried different ac cable.
• replaced PSU with another ( but from 2500A and 2000A series)
• placed 3004A PSU into 2500A ( works ) so its not PSU.
• cleaned whole PS and applied new thermal paste.
• replaced PSU AC inlet with another.

So if you guys have something else i should try, please tell me. Thank you all in advance