HELP bois won't post

Squidysquid1

Commendable
May 24, 2016
4
0
1,510
I build my computer 6 months ago. It's worked fine since then and about a month ago the bios won't post with no hard ware changes. The cpu led was on and would not post.I contacted asus and sent it in to get repaired they sent it back saying they replaced the cpu socket and some other stuff. It worked when I put all of the components again and the next day I try to turn it on again and it was the same problem.so I contacted them again and they sent me a whole new mother board I just put all of the components back in and it still doesn't work!!! Same problem and I don't know what to do now!!!
Specs
Gtx asus 980
Asus z97-a motherboard
And a intel Core i7‑4790K