- Notes, cautions, and warnings
- Working on your computer
- Stands
- Removing and installing components
- Recommended tools
- Screw List
- Major components of your system
- Hard-drive assembly
- Hard-drive bracket
- Hard drive
- Solid-state drive in the hard-drive bay
- Solid-state drive daughter board
- Cover
- Memory module
- WLAN card
- Internal solid-state drive
- eMMC Storage module
- System fan
- Power button
- Coin-cell battery
- System board
- Heat-sink
- Replacing the chassis
- Software
- System setup
- Troubleshooting
- Getting help and contacting Dell
OptiPlex 7090 Ultra Service Manual
Diagnostic LED
Instead of beep codes, errors are indicated by the bicolor Battery Charge/Status LED. A specific blink pattern is followed by flashing a pattern of flashes in amber, followed by white. The pattern then repeats.
NOTE The diagnostic pattern consists of a two-digit number being represented by a first group of LED blinks (1 through 9) in amber, followed by a 1.5 s pause with the LED off, and then a second group of LED blinks (1 through 9) in white. This is then followed by a three second pause, with the LED off, before repeating over again. Each LED blink takes 1.5 s.
The system will not shut down when displaying the Diagnostic Error Codes.
Diagnostic Error Codes will always supersede any other use of the LED.
| Blinking Patterns | Problem description | Faults | |
|---|---|---|---|
| Amber | White | ||
| 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 | Auto-Recovery trigger, recovery image is not found or is invalid. |
| 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. |
NOTE For diagnostics pattern 2-amber, 8-white connects an external monitor to isolate between system board or graphics controller failure.
Please provide ratings (1-5 stars).
Please provide ratings (1-5 stars).
Please provide ratings (1-5 stars).
Please select whether the article was helpful or not.
Comments cannot contain these special characters: <>()\