The most likely issue you will run into with a laser printer is a toner cartridge causing a print quality issue. Just about every manufacturer offers a prorated warranty for those cases. Better ones will exchange the cartridge. Other than that they are very reliable. In the extremely unlikely event a PCB's (printed circuit board) or laser unit fails. It has been my experience that if something is going to fail it usually happens very early, well within the warranty period. Other issues apply to both types of printer. Offline, won't print, paper jams, etc.