Hi, to know which component to change, you have to troubleshoot the motherboard before changing something. After you need the skill to desolder the component and to solder the new one. This is the reason you have the electronic technicians.
Yes i know how to desolder. I am doing reballing for 2 years. I did so many mother boards and reball so many chipsets. I changet few mosfets too on other boards. I am asking on this kind of MB. I desolder CPU and mesure mosfeths desoldered too, and their are good. and few capacitors on power part and everything seems fine. but laptop wont start.