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Dell OptiPlex 7770 All-in-One Service Manual

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Diagnostics

Power status light: Indicates the power status.

Solid Amber – The system is unable to boot to the operating system. This indicates that the power supply or another device in the system is failing.

Blinking Amber – The system is unable to boot to the operating system. This indicates that the power supply is normal but another device in the system is failing or not installed properly.

NOTE: : To determine the device that is failing, see the light patterns .

Off – System 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. Diagnostic LED/Beep codesThe following table shows different light patterns and what they indicate:
LED # of Flashes Problem description Faults
2,1 Faulty system boardFaulty system board
2,2 Faulty system board, power supply unit (PSU), or cablingFaulty system board, power supply unit (PSU), or cabling
2,3 Faulty system board, CPU, or DIMMSFaulty system board, power supply unit (PSU), or DIMMS
2,4 Faulty coin cell batteryFaulty 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.

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