Basically I walked into my room the other day and smelled a burning smell, it almost smelled like wet paint. I concluded it was coming from my PC and immediately shut it off. The smell was strongest near the psu (a decent cm750 semi modular unit ive had for about 4 or 5 years). I powered it back on to see if the smell was coming from there, and best I can tell it is. So i left it off for the day. The next day I walked in and decided to do some cable management behind my desk and left my pc on at idle to look at CPU and GPU temps while I did to make sure they weren't the culprit. After about 10 minutes my PC shut itself off, and immediately tried to power itself back on, but failed and turned off again. It repeated this cycle until I unplugged it, and its been sitting there since. I want to know if this sounds like a PSU or possibly mobo issue and if there is any for sure way to determine which it is before I buy parts I dont need.