Before you start: switch a printer off and unplug it before reaching inside. Some steps can void a warranty or damage hardware if done wrongly, and are flagged where that applies. If a machine is under warranty, or a fault involves the power supply or internal electronics, contact the manufacturer or a qualified technician instead. Brand names and model numbers are trademarks of their owners and are used here only to describe the equipment a guide applies to. PrinterFixUp is not affiliated with any printer manufacturer.