The Epson ET-2400 is a popular ink tank (EcoTank) printer designed for high-volume, low-cost printing. However, like all inkjet printers, it relies on a service-maintained waste ink counter. When this counter reaches a predetermined limit, the printer displays a "Service Required" error (typically indicated by blinking lights or an error message on the connected device) and ceases to function. This paper outlines the definition, necessity, and step-by-step procedures for performing a on the Epson ET-2400, including software-based resets and hardware maintenance.