Allo cdpaul
If you can trace which wires from the power-switch button go to which pins on the motherboard, you can either pull the leads off the motherboard (after taking a note of where they go back
) and check the switch+wires with a torch-bulb and battery, continuity-meter or multimeter.
Failing that, try bridging the motherboard connection pins with a short length of wire for a second or so. Take care NOT to contact any other nearby pins though, that could easily end in tears
