Hercules DJCONTROL INPULSE T7 Manual page 81

Lighting test
To test whether the DJControl Inpulse T7 controller's
LEDs are working (without using DJ software to do so),
click the light bulb icon to light up the controller's LEDs.
The icon turns green during the test, and the controller's
LEDs light up.
You can also light up all of the DJControl Inpulse T7
controller's LEDs by simultaneously pressing the IN
and OUT buttons on both decks.
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