GPU blew some fuses and capacitors, friend fixed the GPU, but now it won't boot.

[frank62899]

CPU Intel - Core i5-4670 3.4GHz Quad-Core Processor
Motherboard Gigabyte - GA-H87M-HD3 Micro ATX LGA1150 Motherboard
Memory ADATA - XPG V2 8GB (2 x 4GB) DDR3-1866 Memory
Storage Crucial - M500 120GB 2.5" Solid State Drive
Storage Western Digital - RE3 1TB 3.5" 7200RPM Internal Hard Drive
Video Card Sapphire R9 290x
Case Cooler Master - N200 MicroATX Mini Tower Case
Power Supply Corsair - CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply
Optical Drive LG - GH24NSB0 DVD/CD Writer
Monitor Acer - G236HLBbd 23.0" 1920x1080 60Hz Monitor

I was playing fornite on my desktop last year when it shutoff. My desktop would boot, but it wouldn't POST. My friend took my GPU apart and found some fuses and capacitors had burnt up. He replaced them and got the GPU to work on his rig. He was able to boot and post, and ran a stress test for a few hours to ensure that it was working.

So I got my GPU back and put it in my desktop and still no posting or booting.

Here's what i've tried:

• 
  I bought a completely new PSU and it didn't change anything.
  
  When I plug in only one of the GPU power cables, or when I have no GPU power cables plugged in, then my desktop will POST, but not when I have two.
  
  I've confirmed that my desktop works using integrated graphics.
  
  The fans spin on the GPU and everywhere and there's a light on the GPU that turns on.
  
  I only have one PCIE slot so I can't test another one.

What I'm thinking is that the problem lies in the motherboard but I'm not sure, any ideas?

 

[ss202sl]

try a different GPU to see if it works.