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HP DeskJet 600, 600C, 660C, and 660Cse Printers and HP DeskWriter 600 and 660C Printers - How to Perform Self-Tests and Diagnostic Tests

 note:
There are two buttons and corresponding lights on the front panel of the printer. The top button is the Resume button. The bottom button is the Power button.
Printing a Self-Test
Before beginning the self test:
  1. Be certain that the printer is not connected to an active IO.
  2. Make certain that both print cartridges are properly installed and that the top cover is completely closed.
Running the self-test when the printer is off:
  1. Press and hold down the Resume button.
  2. While holding the Resume button, press and release the Power button.
  3. Release the Resume button.
Running the self-test when the printer is on:
  1. Press and hold down the Resume button for 3 seconds.
  2. Release the Resume button.
Continuous Printing Self-Test
The continuous printing self-test is the same as the printer self-test, except that once it is started it continues until stopped.
To begin the continuous printing self-test:
  1. Hold the Power button down while pressing the Resume button 10 times.
  2. Release the Power button.
To stop the continuous printing self-test, push the Power button to turn the printer off.
Diagnostic Test
To start the diagnostic test:
  1. With the printer on and ready to print, hold down the Power button.
  2. Press the Resume button 5 times.
  3. Release the Power button.
The diagnostic test produces the following information.
PRINTER INFORMATION
PURPOSE
Diagonal Self-Test Pattern
Verify that all nozzles on the print cartridge are firing. If a gap appears along the diagonal self-test pattern, one or more nozzles are not firing.
Printer Internal Information
Identify the printer and firmware for determining possible problems.
Print cartridge identification
Printer model identification
Printer model number
Firmware data and revision
Status
Print Skew Information
Determine if print skew is out of tolerance. (Print would appear tilted on the page.)

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