Step | Action |
1 | Enter the printer's Diagnostic Menu. Follow the directions below.
- Power off the printer.
- Press and hold the
and buttons on the printer operator panel.
- Power the printer back on, still keeping both buttons held down.
- Keep both buttons held down until you see Engine Warming appear on the printer screen. At this point, you can let go of the buttons.
- When the printer has completed the warm-up sequence, a new menu should appear on the screen. This is the Diagnostic Menu.
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2 | Once you are in the Diagnostic Menu, press the button until the is next to Print Tests. |
3 | Press once. A new set of menu choices will appear. |
4 | Press until the is next to Print Quality Pages. |
5 | Press again. The printer will print out a set of pages. These pages allow each color plane to be viewed independently to determine if the issue is with one color (possibly due to a single supply item), or with all the colors (indicating a more general issue with the printer). |
6 | Check to see if any of the quality pages have a vertical streak down the page. If there is a streak on any of the pages, remove the toner cartridge corresponding to the color of the streak. |
7 | One you have removed the relevant toner cartridge, print the print quality pages again. If the streak goes away, the cause of the issue is that toner cartridge. You will need to replace it with another toner cartridge of the same color. IMPORTANT! Please carry out the following checks on the cartridge first:
- Confirm that you are using an original Lexmark brand toner cartridge. If a third-party cartridge is causing this issue, contact the point of purchase to have the cartridge replaced.
- Confirm that the toner cartridge has not been refilled or reworked in any way. Refilling the toner cartridge can damage it, leading to print quality issues of this kind. If the cartridge has been refilled or reworked, contact the place where it was refilled to have it replaced.
- If this is an original Lexmark toner cartridge, inspect it for any damage or defects. If you notice any damage to the cartridge or any loose parts on it, contact Lexmark Technical Support. The cartridge may be eligible for replacement, depending on how old or used it is. IMPORTANT! If the toner cartridge does not appear to be damaged but is relatively new or unused, it may still be eligible for replacement. Please contact the point of purchase first as they may have a replacement policy. If the point of purchase cannot assist you or if you cannot remember or locate the number you used to contact Lexmark when ordering the cartridge, contact Lexmark Technical Support. A representative there may be able to provide assistance. If the cartridge was purchased directly from Lexmark, contact Lexmark using the phone number or address you used to order the cartridge.
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8 | If there are multiple streaks of one color on the page and those streaks do not line up as you go down the page, replace the photoconductor unit for that color. NOTE: If the photoconductor unit level is not reading as low (see 'Check the supply levels' above), contact Lexmark Technical Support. You may be eligible for a replacement photoconductor. This applies only if the installed photoconductor unit is an original Lexmark brand item.
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9 | To exit the printer's Diagnostic Menu, power off the printer. Let the printer sit, powered off, for 10 seconds. Then power it back on as you normally would, i.e. without holding down any buttons. |