Testing an ATX12V2.0 power supply before connecting it to the system board.
I'm testing a new ATX12V2.0 power supply before connecting it to the system board. I'm getting low/no voltage on the 12V2 rail of the 24 pin molex connector and no voltage on the 4 pin molex connectors. Am I missing something or does it sound like the power supply is bad? This is probably a ridiculous question, but I have to check - the 24 pin connector doesn't have to be connected to the system board in order to read voltage from the 4 pin connectors, does it?