I've had this custom build for 6 months and only today has this happened. I shut off the computer to go out and upon returning the computer will not power on at all when pressing the button.
The green LED on my GPU shows that the PSU and MB are not dead as it's recieving power.
What I have tried
- Unplugging and then plugging back in all PSU cables connected to the motherboard
- Reseated the System Panel connectors and made sure they are the right way