While playing a game a week ago my computer randomly crashed. As it was late I went to bed and didn't think about it. A couple days later I went to start my computer again to no avail. While everything seemed to get power I had no video output. This setup has been running steady for ~3 years. I have been running the computer with an overclock since I installed the H115i ~2 years ago, mostly it has been at 4.8-4.9 GHz. It was overclocked using the built in ASUS utility. Any help with this would be appreciated. I'll try to be as detailed as possible below. (PS: I swear I'm not a Corsair Fanboy)
Setup:
CPU: 4790k
Motherboard: Asus Z97-AR
Memory: Patriot G2 DDR3 2x8gb (1333MHZ I think)
Cooler: Corsair H115i
Case: Corsair 600c Inverse ATX
Power Supply: Corsair RM 850 (90% sure thats right)
GPU: MSI GTX 1060 Gaming X 6G
Drives: PNY 460GB SSD
Samsung 860 EVO 500GB
2 TB HDD
3 TB HDD
Monitors: 2x ASUS VG248QE
PCIe Cards: 2 USB expansion cards
Symptoms:
Random shutdown
Motherboard Boot LED's: Boot Device LED stays red
Beep Codes:
Without Keyboard: 1 Long, 4 Short, Pause, 1 Short
With Keyboard: 1 Short
No video output to either monitor
Case and cooler fans spin, keyboard and mouse get power
No POST screen
PSU fan does not spin on startup, not sure if it usually does
Troubleshooting:
So far I have tried just about everything I can think of short of breadboxing because I haven't had a chance to pull out the motherboard and cooler.
I have removed everything besides the CPU, Motherboard and PSU. I have tested both sticks of RAM in every slot individually.
I have unplugged everything from the USB ports and tried with just the keyboard and/or mouse.
I have removed all PCIe cards.
I have plugged each monitor into the motherboard directly using both HDMI and DisplayPort.
I have reseated the CPU.
I have ensured there is no wires shorting anywhere and there is no metal shorting between the motherboard and case.
I have unplugged the front panel USB ports. I've tried with and without GPU and still no video output.
I've cleared the CMOS several times.
I've replaced the CMOS battery.
My Ideas:
My primary suspects right now are motherboard or PSU. I wasn't thinking PSU until tonight when I finally got a motherboard speaker and could listen to the beep codes. I want to get other peoples' opinions before I buy any parts. If it is the motherboard I'm not even sure where to buy a compatible motherboard anymore that isn't ridiculously expensive. Attached is a random picture of the computer in question because reasons.