4078-00X
Parallel Port Test
This test performs a wrap around test between the printer parallel port and the parallel port test connector.
This test requires a parallel port wrap plug. Install the wrap plug in the parallel port before you start the test. The power on light flashes if the test is successful. If the test is not successful, the power on light remains off.
To run the test:
1.With a parallel port wrap plug installed and the printer off, press and hold the following button while turning the printer on:
2.Paper Feed 
After five seconds, release the button to begin the test.
The Power On light blinks upon successful completion of the test.
A failing test causes the Power On light to remain off. Turning the power off or unplugging the printer ends the test.
Diagnostic Aids