Laptop (old) Sony Vaio VGN-FE doesn't start

[Pizza&Birra]

Hi, I have an old Sony vaio VGN-FE laptop, it has always worked well, the other day I turned it on and I have the green light on, but nothing starts (the fan stays still, it doesn't even try to start) . I have no experience in the field of PC card, but I have all the necessary equipment for electronic repairs. For now I have only dismantled the motherboard and saw that the 19.5Dc input is there. Any help in finding out what went wrong?

Add two photos of the motherboard; I don't know how to attach the service manual, but it's easy to find online (Sony Vaio mbx149)
Thank you

[Pizza&Birra]

I made some measurements in the affected area of the laptop boot. On the wire connector that goes to the power button module, I have the required 3v valw on pin 7 (3.4v). While on pin 8 (pwrsw) I have 7.2v. When I press the start button, the PWR LED lights up (I analyzed the signal, in fact while it is pressed the voltage goes to zero and then returns to 7.2), but the fan doesn't start and nothing else. So pressing the start button correctly reaches the motherboard on pin 8 of the cn44; I also tried starting by short-circuiting J1, and ok the pwr led starts.

I then measured in the area where the pwrsw signal arrives, and marked the voltages on the attached images. The value of the resistors is correct (on the SM they indicate 75kohm, but in reality I think they had set them at 47kohm). The vsource arrives, I see that there is no voltage in some parts of those transistors. Below I have photos of the affected areas and extracts from the SM. Do you have any suggestions on what other checks to do? Thank you

[Pizza&Birra]

End of the game, while testing the voltages I burned the chip that supplies the 3 and 5v. Next time I'll test the voltages away from the chip pins! It was a laptop I no longer used anyway, I took the opportunity to learn.