Brand: Dell
Category: Desktop Computer
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for Precision 5820 Tower
Uploaded: Sept. 12, 2025, 4:23 a.m.
Warranty Information
Refer to the warranty information that shipped with your product for specific details.
Working on your computer
Safety instructions are provided to protect your computer and ensure personal safety. Before working inside the computer, always disconnect all power sources and ground yourself to prevent electrostatic discharge. Follow the steps for turning off the computer and preparing your workspace.
Removing and installing components
This section details the removal and installation procedures for various components, including the side cover, power supply unit (PSU), front bezel, hard disk drives (HDD), optical disk drives (ODD), front input/output panel, and system board. Each procedure outlines the necessary steps and precautions.
Troubleshooting
Common troubleshooting steps are described, including using the Dell Enhanced Pre-Boot System Assessment (ePSA) Diagnostic 3.0. This includes instructions on running diagnostics and interpreting preboot blinking power button codes to identify and resolve potential hardware issues.
Troubleshooting and error codes
| Power Button LED State | Description |
|---|---|
| Off | Power is Off. LED is blank. |
| Blinking Amber | Initial State of LED at power up. See the table below for Blinking Amber pattern diagnostic suggestions and possible failures. |
| Blinking White | System is in a low power state, either S1 or S3. This does not indicate a fault condition. |
| Solid Amber | The second state of the LED at power up, indicates that the POWER_GOOD signal is active and it is probable that the power supply is fine. |
| Solid White | System is in SO state. This is the normal power states of a functioning machine. The BIOS will turn the LED to this states to indicate it has started fetching op-codes. |
| Power Light: Amber-White Blinking | Amber/White Blinking Pattern | Problem Description | Suggested Resolution |
|---|---|---|---|
| 1-1 | 1 amber blink followed by a short pause, 1 white blink, long pause, then repeats | Faulty System board | To troubleshoot the issue with system board, contact Tech support. |
| 1-2 | 1 amber blink followed by a short pause, 2 white blinks, long pause, then repeats | Bad system board, Power Supply or Power Supply cabling | If you can assist to troubleshoot, narrow down the issue with PSU BIST Test, reseat cable. If nothing works, contact Tech Support |
| 1-3 | 1 amber blink followed by a short pause, 3 white blinks, long pause, then repeats | Bad system board, Memory or Processor | If you can assist to troubleshoot, narrow down the issue by reseating memory and swapping a known good memory if available. If nothing works, contact Tech Support |
| 2-1 | 2 amber blinks followed by a short pause, 1 white blink, long pause, then repeats | Bad Processor | CPU configuration activity is in progress or a CPU failure was detected. Contact Tech Support |
| 2-2 | 2 amber blinks followed by a short pause, 2 white blinks, long pause, then repeats | Motherboard: BIOS ROM failure | System is in Recovery Mode. Flash latest BIOS version. If problem persists, contact Tech Support |
| 2-3 | 2 amber blinks followed by a short pause, 3 white blinks, long pause, then repeats | No Memory | If customer can assist to troubleshoot, narrow down the issue by removing the memory module one by one to determine which one failed and swapping to a known good memory if available to confirm. Contact Tech Support |
| 2-4 | 2 amber blinks followed by a short pause, 4 white blinks, long pause, then repeats | Memory/RAM failure | If customer can assist to troubleshoot, narrow down the issue by removing the memory module one by one to determine which one failed and swapping to a known good memory if available to confirm. Contact Tech Support |
| 2-5 | 2 amber blinks followed by a short pause, 5 white blinks, long pause, then repeats | Invalid memory installed | Memory subsystem configuration activity is in progress. Memory modules have been detected but appear to be incompatible or in an invalid configuration. If customer can assist to troubleshoot, narrow down the issue by removing one by one the memory on motherboard to determine which one failed. Contact Tech Support. |
| 2-6 | 2 amber blinks followed by a short pause, 6 white blinks, long pause, then repeats | Motherboard: Chipset | Fatal system board failure detected. If customer can assist to troubleshoot, narrow down the issue by removing one by one the component on motherboard to determine which one failed. If you identified any of the components failed, replace the Component. Contact Tech Support. |
| 3-2 | 3 amber blinks followed by a short pause, 2 white blinks, long pause, then repeats | PCI Device or Video | PCI device configuration activity is in progress or PCI device failure was detected. If you can assist to troubleshoot, narrow down the issue by reseating PCI card and removing one by one to determine which card failed. Contact Tech Support. |
| 3-3 | 3 amber blinks followed by a short pause, 3 white blinks, long pause, then repeats | BIOS Recovery 1 | System is in Recovery Mode. |
| 3-4 | 3 amber blinks followed by a short pause, 4 white blinks, long pause, then repeats | BIOS Recovery 2 | System is in Recovery Mode. Flash latest BIOS version. If problem persists, contact Tech Support |
| 4-6 | 4 amber blinks followed by a short pause, 6 white blinks, long pause, then repeats | RAID Volume degraded | RAID volume is degraded. If you can assist to troubleshoot, us F12 menu to enter Device Configuration tab. Rebuild the RAID volume if possible Contact Tech Support. |
| 4-7 | 4 amber blinks followed by a short pause, 7 white blinks, long pause, then repeats | System Side cover is missing | System side cover(either left or right) is missing. Unplug power, Install back all side covers back to the chassis and plug in power. Contact Tech Support. |