Case Power LED Blinking Rapidly But Computer Not Powering?

bluelightning87

Reputable
Mar 5, 2015
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4,510
Hello,
I recently built a desktop computer. Everything was going well, and I've had no problems with it being fully functional over the past week or so, but after leaving my computer on for a few hours while I was away today my computer does not power on. When I returned home, the power LED on my case was blinking rapidly (every 1 second or so), so I assumed the CPU was in sleep mode. I tried to "wake up" the computer to no avail. I then tried to hold the power button to turn the computer off, still to no avail. I checked my fans, and none were running. In order to get the computer to turn of, I turned the power supply off. Then, I turned it back on. Now, pressing the power button does nothing--not even start the blinking sequence. I have no idea what's wrong. Any and all help is much appreciated, and this will be updated as necessary.