Faulty PSU?

Got back from a vacation last Sunday and had no issues with my PC. One night I woke up to a repair screen saying that there was some failure with my memory management. I left it all morning and it was indefinitely stuck at 0% so I decided to just hard reset my PC. That seemed to fix it, until it went into sleep mode. When I went to turn on my PC all the fans turned on for roughly 15 seconds before making the cutout zap sound when the PC turns off and the CPU fan turning off and on. The monitor also didn’t turn on. I originally thought that it was my CPU 24-pin plug that came unseated which fixed it for about a day. Yesterday I was playing Microsoft Flight Simulator 24 when the application closed, my PC froze, my monitor went black, followed by a message saying, ”Stop code: Memory Management error”.

(I have a Corsair CX 550)