PC won’t boot suddenly
So small backstory
around half a year I build my first PC everthying das completely fine until recently. About a week ago after booting up my PC it would completely shut down after around 20s. Tried a few time but it remained. So I remembered that a few of my Data connections to my HDD and SSD were a little bit bent so I fixed that and my PC worked again without a problem. That’s was until today.
I booted up my PC and after like 5 seconds it shut down. Thought maybe it’s the sata cables again, fiddled with them a bit and tried again but now to PC wouldn’t even boot. The PSU just made a short onetime clicking sound and nothing more. So I disconnected everything beside the 24 ATX PIN and tried again and the motherboard showed it had power. Connected to CPU Pin and still worked and all the Motherboard LEDs were showing green. But when I tried to connect my Graphic card it booted but shut down again after 5s. Connected all my sata cables and the PC wouldn’t boot again. Only the PSU made one clicking sound. So I disconnected everything expect the 24 ATX Pin and still nothing worked. The motherboard showed a red led by the CPU connector that it wasn’t connected witch it hasn’t done before (but that probably means the motherboard got power if a led was glowing?). I tried everything. Reconnected every cable checked every connections but still nothing just a short onetime clicking noise from the PSU.
So I’m thinking that’s it’s probably a problem with the PSU (maybe 750W wasn’t enough) or the motherboard but I don’t really know how to check