The issue is unclear. Could you provide more details?
The issue is unclear. Could you provide more details?
It seems the power supply unit might be having issues based on these fluctuations.
It remained functional throughout, as if I managed to run several games without any issues. But now that it's turned off, it won't power up. Could this be related to the PSU?
I believe you're dealing with two separate problems. The first concerns your PSU not being able to keep your computer running. Switching to another PSU might resolve that. Your machine won't start when you press the power button, so focus on that issue. If you have a third PSU available, you could attempt testing it, though you've already used another one. If the computer still won't turn on, try unplugging it from the wall, pressing the power button several times, then plugging in the outlet and restarting. If it reboots, the problem might be related to Windows settings (like sleep or FastBoot) or a BIOS issue—clearing CMOS or updating the BIOS could help. Another possibility is a faulty or dirty power button; you might try using a different button such as the reset switch. Good luck!