I'm trying to help a friend out that has a Dell dimension b110 that will not boot. When the power is turned on the lights come on for a second and the fan starts to turn but then everything dies. Not even a blinking amber light on the front. I tried a different power cord and I tried making sure none of the MB plugs had come loose. It does the same thing regardless of whether or not the keyboard, mouse, and monitor or plugged in. No other external peripherals are plugged in. Any ideas on things to try before buying a new power supply. I would hate for them to buy a new PS and have it turn out to be a motherboard issue.