Right on your PSU theres the main attachment to your motherboard. Long begger.
Thats what you want to test, your manufacturer should provide you with a circuit diagram and wire listing. Then you just touch the relevant bits and note the voltages, comparing them to what they should be for your system.
Thats what you want to test, your manufacturer should provide you with a circuit diagram and wire listing. Then you just touch the relevant bits and note the voltages, comparing them to what they should be for your system.