Owners Manual

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 4. Diagnostic LED/Beep codes

LED # of Flashes Problem description Faults

2,1 Faulty system board Faulty system board

2,2 Faulty system board, power supply unit

(PSU), or cabling

Faulty system board, power supply unit (PSU), or cabling

2,3 Faulty system board, CPU, or DIMMS Faulty system board, power supply unit (PSU), or DIMMS

2,4 Faulty coin cell battery Faulty coin cell battery

2,5 BIOS Recovery AutoRecovery trigger, recovery image is not found or is

invalid

2,6 CPU CPU Error

2,7 Memory Memory SPD failure

3,3 Memory No memory detected

3,5 Memory Modules incompatible or invalid configuration

3,6 BIOS Recovery On-demand trigger, recovery image is not found

3,7 BIOS Recovery On-demand trigger, recovery image is invalid

The system 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 system.

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

• Solid white – Camera is in use.

• Off – Camera is not in use.

LCD built in self test - BIST

All-in-One (AIO) systems supports LCD BIST similar to any other Dell systems that have BIST test implemented. It allows the user to

isolate the LCD during troubleshooting to determine which sub-system is at fault. The main difference is the lack of an integrated

keyboard scan controller in the AIO. When BIST is initiated, an internal generated pattern from the LCD will be emitted for user's

observation. This pattern will go by sequence through this pattern, Red- Green-Blue-White-Blue where each pattern is emitted for 2 to 3

seconds.

The following images displays the pattern of the colors on the LCD:

Standard display

Troubleshooting your computer