I have a Dell OptiPlex 260 and when I depress the power button to start the computer, it has a yellow light on it, but when you push the button nothing happens. I tried to unplug it for about 10 or 15 minutes then plugged it back in, all I get is a yellow light from the switch on the front of the machine. I can turn the monitor on but it never shows any kind of screen at all. I opened up the case and the mother board has a light that is lit on it but that is it. I unplugged it again and replugged it in but still nothing.
