Inserted the 24-pin connector while the power supply was active.
Inserted the 24-pin connector while the power supply was active.
I built a PC and connected all cables during setup. I put in the 24-pin connector while the PSU was on. I noticed the PSU switch was active, so I turned it off and unplugged it. After installing the 8-pin CPU connector, I waited a bit and then reconnected the PSU. The system started working normally. Later, when trying to boot, it didn’t turn on. After a few resets, it worked fine. I’m checking if my actions might have damaged any parts and if I should replace them.
If everything is working properly, you should be fine. Fried parts seldom, if ever, regain their original state.
You seem to be implying you meant connecting the power supply with the switch activated. It's okay; using a plugged-in PSU helps maintain grounding and avoids shocks while assembling your PC. This approach was once common and still recommended by some.
When the PSU's on switch is activated, only a limited portion of the power supply operates, specifically the one generating 5V standby for the chipset or BIOS on the motherboard. Generally, connecting the 24-pin connector while the PSU switch is in the 'on' position functions similarly to connecting a phone charger cable into a phone. It's essentially a minor action. Power supply fully engages only when the motherboard transmits a signal to it.