Introduction 1-9AccessBuilder 500 Front and Rear Panel FeaturesFront PanelFigure 1-2 AccessBuilder 500 Front Panel FeaturesPOWER This LED indicator shows the following:n On – Power is connected to the unit and the rear panel On/Offswitch is set to the ON position.n Flash – Indicates that the unit’s main program is corrupted andneeds to be reinstalled.n Off – No power supplied to the unit. See “Troubleshooting” onpage 1-48 for more details.