I turned on my PC and my fans and lights turn on even my mouse and keyboard light up but nothing is displayed on the monitor. This is not a new pc and no changes have been made. I temporary fix I have been using is unplugging the power cable from PSU and turning the pc on, apparently it clears something. Using this method it boots normally sometimes but I'm sick of it and just wan it to boot when I turn it on. Also PC runs normally when booted.