Actions Yes No
Step 3
Clean the printhead glass. See
“Cleaning the printhead glass” on
page 764.
Does the problem remain?
Go to step 4. The problem is
solved.
Step 4
Replace the printhead. See
“Printhead removal” on page 455.
Does the problem remain?
Go to step 5. The problem is
solved.
Step 5
Replace the imaging unit.
Does the problem remain?
Contact the next
level of support.
The problem is
solved.
Vertical dark bands check
Note: Before performing this print quality check, go to the control panel home screen and navigate to
Settings > Troubleshooting > Print Quality Test Pages, and then perform the initial print quality check.
See
“Initial print quality check” on page 44.
Actions Yes No
Step 1
Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note: If the printer is using a third‑party cartridge, then refer the
users to their cartridge supplier.
Is the printer using a genuine and supported toner cartridge?
Go to step 3. Go to step 2.
Step 2
Install a genuine and supported toner cartridge.
Does the problem remain?
Go to step 3. The problem is
solved.
4064
Diagnostics and troubleshooting
66
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