Quick question

[Alaric]

I'm cobbling together a power supply to test an HP Desktop All-In-One. I picked up a tip (7.4 mm x 5 mm with a wire center probe) I don't have the original PS, so can anyone tell me which contacts are supposed to be +DCV and which is -DCV? The PS I'm using doesn't have a third lead, so it will have to function without the monitoring lead. I'm assuming (!?) the inner contact surface is positive, but computer manufacturers just love proprietary nonsense, soooo.......

[Alaric]

Turns out my initial assumption was correct, inner contact is indeed +DCV. Now I can move on to a reformat and reinstall of the OS. LOL