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


there are 4 lights on the back of the computer labled 1 2 3 4, check to see if they light up or not.

I'm going to try swapping powersupplies with my friend at school in January. If it's not the power supply I will probably just build a new one. Thanks for your help, I'll let you know how things go.