- Notes, cautions, and warnings
- Views of OptiPlex Tower Plus 7020
- Set up your OptiPlex Tower Plus 7020
- Specifications of OptiPlex Tower Plus 7020
- Dimensions and weight
- Processor
- Chipset
- Operating system
- Memory
- External ports
- Internal slots
- Ethernet
- Wireless module
- Audio
- Storage
- Redundant Array of Independent Disks (RAID)
- Media-card reader
- Power ratings
- GPU—Integrated
- GPU—Discrete
- Hardware security
- Environmental
- Regulatory compliance
- Operating and storage environment
- Working inside your computer
- Removing and installing side cover
- Removing and installing coin-cell battery
- Removing and installing Customer Replaceable Units (CRUs)
- Removing and installing Field Replaceable Units (FRUs)
- Power button
- Wireless antenna kit
- Processor fan and heat-sink assembly
- Power-supply unit
- System fan
- Processor
- Voltage-regulator heat sink
- Optional I/O modules
- System board
- Software
- BIOS Setup
- Troubleshooting
- Getting help and contacting Dell
OptiPlex Tower Plus 7020 Owner's Manual
System-diagnostic lights
This section lists the system-diagnostic lights of your OptiPlex Tower Plus 7020.
Diagnostic light
The power and battery status light indicates the power and battery status of the computer. These are the power states:
Solid white: Power adapter is connected, and the battery has more than 5% charge.
Amber: Computer is running on battery, and the battery has less than 5% charge.
Off:
- Power adapter is connected, and the battery is fully charged.
- Computer is running on battery, and the battery has more than 5% charge.
- Computer is in sleep state, hibernation, or turned off.
The power and battery-status light may blink amber or white according to pre-defined "beep codes" indicating various failures.
For example, the power and battery-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 no memory or RAM is detected.
The following table shows different power and battery-status light patterns and associated problems.
NOTE:The following diagnostic light codes and recommended solutions are intended for Dell service technicians to troubleshoot problems. You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty.
| Blinking pattern | Problem description | |
|---|---|---|
| Amber | White | |
| 1 | 2 | Unrecoverable SPI Flash Failure |
| 2 | 1 | CPU failure |
| 2 | 2 | System board failure (included BIOS corruption or ROM error) |
| 2 | 3 | No memory/RAM detected |
| 2 | 4 | Memory/RAM failure |
| 2 | 5 | Invalid memory installed |
| 2 | 6 | System board/Chipset Error/Clock failure/Gate A20 failure/Super I/O failure/Keyboard controller failure |
| 3 | 1 | CMOS battery failure |
| 3 | 2 | PCI or Video card/chip failure |
| 3 | 3 | BIOS Recovery image not found |
| 3 | 4 | BIOS Recovery image found but invalid |
| 3 | 5 | Power rail failure |
| 3 | 6 | SBIOS Flash corruption |
| 3 | 7 | Intel Management Engine (ME) Error |
| 4 | 2 | CPU Power Cable Connection Issue |
NOTE:Blinking 3-3-3 LEDs on Lock LED (Caps Lock or Num Lock), Power button LED (without Fingerprint reader), and Diagnostic LED indicates failure to provide input during LCD panel test on Dell SupportAssist Pre-boot System Performance Check diagnostics.
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