unknown

asked Jan 12, 2004 at 2:09pm
Hp HP Color Copier 150

hp color copier 150 wont power on

The machine briefly (5 sec) lights the LED's, runs the fan and then powers off when plugged in. On/off switch has no effect. When I unplug the power supply from the circuit board nothing at all happens. It seems the circuit board is allowing the power on and then shutting it off. Why should this be?
Thanks,
Henry