Lexmark W820 User Manual page 50

Symptom
White or black line
Streaked horizontal lines
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Cause
The print cartridge or fuser is
defective.
The print cartridge, transfer
roller, or fuser may be
defective, empty, or worn.
48
Solution
Replace the print cartridge.
See Replacing the print cartridge.
Replace the fuser.
See Replacing the items in the
maintenance kit.
Replace the printer cartridge, the transfer
roller, or fuser as needed.
See Replacing the print cartridge,
Replacing the transfer roller, and
Replacing the fuser for more information.