If you are still having PC issues it also be a bad GPU. If you are running a after market one then try taking it out and testing with just onboard. There are only a few things that cause a PC not to boot when power button pressed. To me it would be a lot cheaper to find the part that is bad and replace just it. I to build custom PC's, been doing it for years and have run into my fair share of problems with faulty parts.
Sent from my SAMSUNG-SGH-I997 using xda premium
There are no secrets to success. It is the result of preparation, hard work, learning from failure.
AEON V 1.4
Samsung G S4:Rooted
Infuse 4G Running:AEON v1.4
Kernel: ENTROPYS DD
G S2 Skyrocket Running:EMBRYO v3.2