The table below summarizes many of the common problems that laser toner cartridges may give, as well as their effect on your printer’s results. This can help you diagnose problems with your printer.
| Problem | Effect on Printing |
| Toner cartridge is defective. | Blank pages; thin, dark vertical lines. |
| Laser cartridge is not seated properly. | Repetitive defects or horizontal lines. |
| Cartridge is leaking. | Marks on the back of the page. |
| Cartridge is low or empty. | Light or faded print. |
| Paper is improperly loaded. | Skewed printing. |
| Cartridge’s waste bin is full | Random splotches on printed paper. |