1.Plug in two prong power cord into PSU 2. Flip over power supply 3. Insert positive and negative prongs from multimeter into two holes on the bottom. Be sure they are fully inserted and not touching any metal or each other. 4. Set multimeter for DC voltage at ~20v. 7. Use a small piece of metal and make contact with the first (5VSB) and 3rd(ACDC_STBY) pin of the connection on the side. Make sure whatever you are using to jumper the pins makes contact with the metal connectors in the connector. This turns on the power supply. 8. If you have done it correctly and the power supply is good, you should get a reading of around 12 volts as shown.