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The Sprint TREBL turns on automatically when the power supply unit is connected to the underside
of the unit.
1. Place the Sprint TREBL on a suitable windowsill and ve
rify that the unit’s rear side is positioned
against the glass as close to the glass as possible (as in the figure 1 below).
2.
Shortly the following will be occurred while the unit is starting up.
VGI Sound:
Your Sprint TREBL is getting Activated
LED Pattern
: Sprint TREBL LED shows 'Pulsing white light' pattern