Sharp LL-S201A - Manual (Page 28)

11.3. Power LED lighting test (Power LED Test)
11.3.1. Overview
The lighting check of Power LED prepared in the lower right of LL-S201A. Displaying
the pattern of green, red, orange, and putting out lights is repeated and continued.
11.3.2. Start and stop
Push the PowerLED Test button. Push the OK button to stop.