User`s guide

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Flowcharts and Tables Troubleshooting
Table 16. White Vertical Lines, Sharp and Well-Defined
Step Check Result Action
1 Try a known-good toner
cartridge. Does the
problem persist?
No Problem solved.
2 Is there a hair or other
obstruction that can be
blocking the laser beam?
Yes Remove the obstruction.
3 Does the symptom appear
on the service test page?
No
Ye s
Replace the I/O board.
Replace the laser/scanner assembly.
Table 17. Black Horizontal LInes, Sharp and Well-Defined
Step Check Result Action
1 Try a known-good toner
cartridge. Does the
problem persist?
No Problem solved.
2 Does the symptom appear
on the service test page?
No
Ye s
Replace the I/O board.
Replace the laser/scanner assembly.