Motherboards are rarely repaired. We may see some new power, USB jacks put on but beyond that it's rare to see any board repair. These are replaced when they fail.
Since you seem to want to fix it, did you check that the button worked? It's all of two points and an Ohm meter to test. Basic repair tech skills.
I went to turn in my laptop and it will not turn on, the battery is showing 3 out of 5 lights for power left and the charger is still in working condition, but when I hit the power button nothing happens. Is there anything I can try to fix my motherboard? I am comfortable taking my laptop apart and putting it together again, but I'm lost when it comes to the fixing of the motherboard.
Any helpful suggestions?