How to Replace a Toner Cartridge in a Brother Laser Printer Estimated reading: 1 minute 416 views Contributors When Should You Replace the Toner Cartridge? The toner cartridge which contains the toner powder which comes in standard or high yield sizes fits inside a drum unit that must be installed together for your Brother printer. Once the toner cartridge reaches the quoted page yield or approximated number of pages, you should be prompted with a message saying toner low or replace toner. Why is Brother Printer Toner Replacement Important? Keeping an empty cartridge for too long fitted can cause the printer to overheat and gives irreversible and expensive damage. Tagged:Brother How to Replace a Toner Cartridge in a Brother Laser Printer - PreviousBrother Printer LCD Screen Blank & Not PrintingNext - How to Replace a Toner Cartridge in a Brother Laser PrinterImprove Print Quality on a Brother Laser Printer