Need help starting computer.

[The Clock]

I'm new to this site, and I hope i posted this in the right section ( sorry if I didn't). So I get off a game on my computer and walk away. I come back, the computer is completely frozen, couldn't do anything. So I turned off the computer. Now the computer refuses to turn on, there is zero sign of life. No lights come on, no sounds, nothing. I've taken apart everything and put it back together, no luck. I was testing the parts on some friends computers, and the power supply, gpu, and ram work. I couldn't test the motherboard and cpu though. Is it one of these parts? I really need help with this.

Ps: I just bought all these parts two months ago.

 

[The Clock]

And for reference my parts are:
EVGA Gtx 950
AMD FX 6300 Black Edition
EVGA 500w Bronze
Gigabyte GA-78LMT Motherboard

 

[R_1]

You'll need either a working CPU or a working Motherboard to continue testing. Can you RMA them both?

 

[The Clock]

You'll need either a working CPU or a working Motherboard to continue testing. Can you RMA them both?

I was thinking of trying to contact amazon and seeing if we can work something out. I'm not even 100% sure its the cpu or motherboard though. I have zero clue why it would just stop working like that.

 

[R_1]

That is the ah heck. Without at least a spare to eliminate one both are suspect.