When I press the power button the HDD led and the power led light up. But the fans wont start. Nothing is displayed on the screen. No beeps either. I tried this to switch on and off for several times but invain. Is my PSU dead? Configuration. Intel P4 1.7GHz 250Watt Power Supply Gigabyte motherboard 512mb SDRAM 133 GeForce Mx200 64Mb Lg CD-Rom Drive. Pioneer DvD Rom Drive. Sony Cd Writer. Win XP Pro.