Recently my monitor is cot starting. I have pluged out VGA cable from my pc. It is showing blue light on power light. But when i pluged it in on my PC and press the start button of my PC it become yellow again. I have checked my RAM. It's ok. I unpluged and pluged it, but nothing happened. Is their anybody to help me?

Have you tried to attach the monitor to a laptop's VGA port and see if you get any image there?

If not, then either the cable or the monitor itself is the problem's source, else there is a problem with your graphics card on the pc.

Try a new VGA cable maybe the cords faulty.