Computer wouldn't shut down after replacing power supply

I decided to replace my PSU in my prebuilt Cyberpower PC running MSI intel.

I connected the cables together. It took me a while to disconnect the factory cables because they were really tough.

I got really tired in the end and my cable management kind fell off. Nevertheless I tried booting it. After it booted it made a weird grinding sound consistently. I decided to not mind it as I thought that it was probably the hard drive. After that I tried gaming a bit on Overwatch, nothing lagged and everything felt fast and snappy. After 1 hour and half of use I decided to shut down to PC.

It then just struck there. Normally the PC would be closed under 10 seconds is struck at the desktop. 3 minutes passed, it finally got more responsive and move on to the black shut down screen, and the cursor was still there. I waited 5 more minutes and nothing changed. I got scared and thought that maybe my motherboard is getting fried so I brute forced a shutdown.

What can I do? Is my motherboard doomed? It was a new PC I got a month ago on the top of that...

Submitted December 30, 2017 at 09:20AM by Briskfall http://ift.tt/2DxUkW6