Well i was on youtube and then an error popped up and suggested to restart. I restarted the computer. but as it reboots another error pops up asking if i should reboot safe mode with all ap running(somethin' like that) reboot safe with only windows and network. Reboot normally so i clicked normally. It went really slow then another error popped up then it froze.. soo i held down the power button on computer to restart. but as i turn on again. the computer runs but not the monitor.. Anybody knows whats wrong?