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XPS 27 Service Manual

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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 1. System diagnostic lights . The following table shows different light patterns and what they indicate.
Light pattern Problem description
2,1 System board error
2,2 System board or power supply unit or power supply cable error
2,3 System board or memory or CPU error
2,4 Coin-cell battery error
2,5 BIOS failure
2,6 CPU failure
2,7 Memory or RAM failure
3,3 Memory error
3,5 Memory error
3,6 BIOS Recovery Image Not Found
3,7 BIOS Recovery Image Found But Invalid

The computer may emit a series of beeps during start-up if the errors or problems cannot be displayed. The repetitive beep codes help the user troubleshoot problems with the computer.

Camera status light: Indicates whether the camera is in use.

  • Solid white – Camera is in use.
  • Off – Camera is not in use.

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