I have a 4yr old dell dimension 5100 that decided not to start today. i.e. no lights, no fans turning, no hard drive motion
-All of the power connections from the power supply have been checked
-All of the cable connections have been checked
-When plugged in, the LED on the motherboard lights up.
-The LED will not dim after unplugging and pressing the power button
-I have tried changing the 'power button' (part # X8682) with no result