PC Freezes randomly, requires hard shutdown, then enters boot loop

Asmodeusss

Reputable
Oct 26, 2015
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So this is a relatively new build, probably a year old.
All connected devices and peripherals suddenly become unresponsive and the speakers generate a loud buzzing noise. After I hard-shutdown the computer, it automatically enters a loop trying to restart but powering off during the initial spin up (I can't reach bios). To fix this I have to unplug the pc, wait for a few minutes and then try again.

Some other symptoms that might be related to the issue:

I have experienced a BSOD and another random shutdown in the past during minimal use.
On one or two occasions there was a purple flash on the monitor followed by a low buzz. (Could be the monitor? Graphics card?)
All this issues started soon after I begun hearing some strange ticking noise. Sometimes it's there, sometimes not but it usually occurs after prolonged use and I suspect it is coming from the PSU.

Unfortunately I don't have any crash files/ dumps or anything to share with you.
So, what do you think is the cause? Thanks in advance.

Specs:
CPU: Intel i5 4590s
MB: Asus H81 Gamer
PSU: Corsair CX500M
GPU: Asus geforce gtx 750 Ti 2gb