Hi, i have a few items I might want to repair depending on expected cost

1.
Acer E5-471PG - 539R series(touch screen)
Problem: wont boot with blank screen..when I press power i can hear only hdd spin but processor fan not spinning..any idea whats wrong with it?

2.
Sapphire HD7770 Vapor-X desktop gpu
Problem: no display and when put on system only 1 fan spin for a while

Thanks in advance