PC suddenly won’t boot

[smoll_bean]

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

[veeg]

Hello
Could be the psu, give us the complete psu spec’s.. Bent pins are never a good sign.. You could do a card board assembly by taking the parts out put on the the cardboard and reassemble and power up, to try to find what hardware isn’t working.

[smoll_bean]

PC specs:
ASUS ROG STRIX B550-A Motherboard
Corsair RM750x PSU
AMD Ryzen 5800X
RTX Evga 3080
Corsair Vengeance RGB Pro
Samsung 970 Evo plus
Samsung 870 Evo

Hi thanks for the answer this is my PSU: RMx Series™ RM750x — 750 Watt 80 PLUS® Gold Certified Fully Modular PSU (EU)
I have a spare working PSU lying around that I will be testing with when I get home

[Rustys]

When was the last time you cleaned the dust form the system?

Get some cans of compressed air and blow the system clean. Make sure the system is powered off and unplugged. Remove the battery if a laptop if the battery can be removed.

Read the instruction on the can. Spray in short burst and when the can start to feel cool to the touch switch to a different can. After they warm up to room temp, they work fine.

Do this in a well-ventilated room or outside this way the dust does not settle all over the inside furniture or worse you or someone inhaling it.

Do NOT turn the cans upside down, turn the system. Remove the battery and blow that our as well.

NOTE: You take the chance of wrecking the bearings of fans with the compressed air. Compressed air can actually accelerate the fans beyond their rated speeds and damage them, if you are cleaning them out with air, it is often recommended to hold the blades in place with a toothpick or other non-conducive material.

NOTE: Do not use a vacuum to clear the dust they can cause a static discharge and end up toasting the system or a components. There are also jumper on the boards that could be sucked off and then the system would be bricked.

Clean the keyboard.
Put the with the laptop facing down then gently rub your hand back and forth over the keys this will knock some of the larger pieces out. Then place the system on its side and blow the keys (remember to use short burst like before) starting from the top working you way down. Heat form portable computers is released through the keyboard.

[Rustys]

Abandoned thread