Brother TN04Y Yellow Toner Cartridge

If debris is the primary cause of failures, toner is the primary cause of debris. All toner cartridges release a small amount of toner powder into the machine. This is why it's important to clean the machine when you change the cartridge.

Most printers have a built-in diagnostics program which can be very useful for troubleshooting problems and test-printing without a computer. They are usually initiated by pressing a button or two while turning on the printer.

Most printers will beep once or twice during or after initialization. If it beeps more than that or beeps constantly, it is telling you that something is wrong. Most printers beep when out of paper or out of ink.