1.Possible reasons for unclear printing by laser printers: (1) Toner problem (insufficient toner, aging or damage of toner cartridge parts) (2) Laser problem (laser is dirty) (3) Fixing part (fixing film is worn or damaged) 2. Solutions for unclear printing by laser printers: (1) Replace the toner cartridge (80% of the time it is a toner problem) (2) Clean the laser (this will happen in a poor environment or if it has not been cleaned for a long time)