Before you begin
Confirm the printer model, connection method, operating system, and the exact symptom. Keep the printer manual available when possible. Use only controls, covers, and compartments intended for ordinary users.
Step-by-step troubleshooting
- Identify the direction
Horizontal banding and vertical lines often point to different causes.
- Print a nozzle or quality test
Use the built-in pattern to identify missing colors or repeated defects.
- Clean only user-accessible areas
Remove loose paper dust and inspect accessible rollers without using solvents unless the manual allows them.
- Run alignment or calibration
Use the printer’s built-in controls after replacing supplies or moving the printer.
- Check supplies and paper
Confirm cartridges, drum units, and paper match the printer requirements.
Verify the result
Repeat the original task using a small test document. Confirm that the printer completes the task consistently, not just once. Reconnect other devices only after the primary device works.
When to stop
Stop if the printer sparks, smells burnt, overheats, has liquid damage, a damaged power cable, grinding noises, or requires major disassembly. Contact a qualified local repair professional or the manufacturer for hardware service.