System Diagnostic Lights - Dell XPS 27 Service Manual

System diagnostic lights

Power status light: Indicates the power status.
Solid Amber – The computer is unable to boot to the operating system. This
indicates that the power supply or another device in the computer is failing.
Blinking Amber – The computer is unable to boot to the operating system. This
indicates that the power supply is normal but another device in the computer is failing
or not installed properly.
NOTE: See the light patterns to determine the device that is failing.
Off – Computer is in hibernation or turned off.
The power status light blinks amber along with beep codes indicating failures.
For example, the power status light blinks amber two times followed by a pause, and
then blinks white three times followed by a pause. This 2,3 pattern continues until the
computer is turned off indicating the Recovery image is not found.
The following table shows different light patterns and what they indicate:
Table 3. System diagnostic lights
Light pattern
2,1
2,2
2,3
2,4
2,5
2,6
2,7
3,3
3,5
3,6
3,7
144
Problem description
System board error
System board or power supply unit or power
supply cable error
System board or memory or CPU error
Coin-cell battery error
BIOS failure
CPU failure
Memory or RAM failure
Memory error
Memory error
BIOS Recovery Image Not Found
BIOS Recovery Image Found But Invalid