I opened my desktop and leave it until it boot. After few minutes, I logged-in my account and noticed that there is a burning smell on my computer. I immediately turned off my AVR thinking something might explode or fireup. It was already midnight so I left it unplugged.
The following day, I removed all the components to check where the burning smell came from. I started from the AVR, and it seems normal.
Then I tried powering up PSU alone (connecting green wire to black to turn it on) and noticed that the burning smell coming out from that component. I checked if there are signs of burn marks but I found nothing, it seems normal, no smoke coming out of the PSU.
Is there a way I could fix it or just a normal compressed air to clean it might repair my PSU? There are dust build up on the dust filter(pc case) and there is a minimal amount of dust inside my PSU.
My power supply is Cougar SL 600 which I bought 3-4 years ago, out of warranty.
I usually leave my computer running overnight (9pm - 5am)