Sega RALLY CHAMPIONSHIP TWIN TYPE Owner's Manual page 58

If ERROR display is shown on the screen, incline the Seat WITHOUT TURNING POWER OFF, and remove Back
Lid B to check the 7-SEG display ont he Drive Control Board. At this time, if the power is turned off, each of the Er 23,
24, and 25 which could have occured during operation may not be displayed.
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