New desktop computer starts and shuts down over time.
I have a new desktop computer. Today I started it and connected my monitor to it. The monitor did not show anything. When I loosened the wire of display my monitor showed 'No signal input'. Again, I tightened that wire and made sure it fitted suitably. But the problem continued.
After some time, the light that shows whether the PC is on or off went out and the PC shut down. In a couple of seconds, it glowed again and the PC started again.
I think it is a problem of my PC rather than the monitor. What can it be and its remedy?