My computer runs but randomly shuts off the displays first, then apps after a little (can still talk to friends for 10-20 seconds). I get a beep from mobo on startup, but then the mobo RBG shuts off. Everything else is on. No integrated graphics, but the onboard video ports show no BIOS either. When running a very non-intensive game, it is usually fine, but the problems began after I added a second, better monitor. Unplugging the monitor does not change anything.