Geta is a common name of a board with extension wires which is used when diagnosing and analyzing a failure through processes of drawing a specific board suspected to have a failure among multiple printed-circuit boards incorporated in a device, attaching a connector to a same-sized printed-circuit board as such circuit board, establishing a one-to-one extension wire between the device and the connector, and observing the performance of a circuit with an oscilloscope or analog multimeter.