Battery Status Lights - Dell P21T Owner's Manual

Storage LED Power LED
Blinking Off
Solid Blinking
Blinking Solid
Off Blinking
Off Blinking

Battery Status Lights

If the computer is connected to an electrical outlet, the battery light operates as follows:
Alternately An unauthenticated or unsupported non-Dell AC adapter is attached to your
blinking amber laptop.
light and white
light
Alternately Temporary battery failure with AC adapter present.
blinking amber
light with
steady white
light
Constantly Fatal battery failure with AC adapter present.
blinking amber
light
Light off Battery in full charge mode with AC adapter present.
White light on Battery in charge mode with AC adapter present.
50
Wireless LED Fault Description
Blinking The USB controller encountered a problem during
initialization.
Blinking No memory modules are installed/detected.
Blinking The display encountered a problem during
initialization.
Blinking The modem is preventing the system from completing
POST
Off Memory failed to initialize or memory is unsupported.