whenever i try to log in my pc ,it goes right upto start up,then suddenly a small noise starts and my moniter turns off.then i try to reboot it,but then the system starts but without any signal in the moniter.is this any motherboard problem or any virus?
Is the noise mechanical or electrical? Sounds like a whine or a click, or what?
A whining, high-pitched noise, kinda like a sci-fi ray gun will be the power supply usually, or the motherboard. Did you check where the sound is coming from? Could be from the monitor also, have you tried a different monitor?