Diagnostic Aids; Diagnostics Mode - Lexmark Optra E 4026-0 Series Reference Handbook

Diagnostic Aids

Diagnostics Mode

To run the printer diagnostic tests, you must put the printer in
Diagnostics mode. The Video Controller card must be plugged into the
connector card (normal state).
Note: Entering the Diagnostic mode clears NVRAM.
To enter Diagnostics mode:
1. Turn the printer off.
2. Press and hold the Ready and Return buttons while turning the
printer on.
3. Release the buttons when [Performing Self Test] is displayed.
The printer performs the Power-On Self Test.
4. You can exit Diagnostics mode without a POR by selecting
[Reset Printer].
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Laser Printer Reference Handbook