hello. i have a desktop computer that doesn't want to show up on my screen. nothing happened to it. i just turned it off and the next day it didn't show on the screen but as soon as i turn the desktop on it did 3 beeps and you can hear it turning on. so i turned everything off and unplugged all the USB that were connected and re plugged them to see if that was the problem. but nothing has changed. yesterday i tried again to see if it would show up on the screen and it did briefly for 10 minutes everything seemed fine but them the screen turned blue with a sad face saying error this computer needs to restart after this. once it restarted no signal once again.