How to Print a Self Test on a HP 1320 Laser Printer

Turn the printer on and wait for the power cycle to run.
Watch for the 'Ready/Go' light to illuminate steady. The light is on the second button from the bottom on the control panel.
Press and release the 'Go' button. The 'Go' button is the one with the 'Ready/Go' light. Wait for the test page to appear in the output tray.