PC suddenly won’t boot

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.

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.

Abandoned thread