User Manual
Table Of Contents
- Dell OptiPlex 3020–Small Form Factor Owner's Manual
- Working on Your Computer
- Removing and Installing Components
- Recommended Tools
- System Overview
- Removing the Cover
- Installing the Cover
- Removing the Front Bezel
- Installing the Front Bezel
- Removing The Expansion Card
- Installing The Expansion Card
- Removing the Optical Drive
- Installing the Optical Drive
- Removing the Drive Cage
- Installing the Drive Cage
- Removing the Hard Drive
- Installing the Hard Drive
- Removing the Speaker
- Installing the Speaker
- Memory Module Guidelines
- Removing the Memory
- Installing the Memory
- Removing the System Fan
- Installing the System Fan
- Removing the Power Switch
- Installing the Power Switch
- Removing the I/O Panel
- Installing the I/O Panel
- Removing the Power Supply
- Installing the Power Supply
- Removing the Coin-Cell Battery
- Installing the Coin-Cell Battery
- Removing the Heatsink Assembly
- Installing the Heatsink Assembly
- Removing the Processor
- Installing the Processor
- Removing the Intrusion Switch
- Installing the Intrusion Switch
- System Board Components
- Removing the System Board
- Installing the System Board
- System Setup
- Diagnostics
- Troubleshooting Your Computer
- Technical Specifications
- Contacting Dell
5
Troubleshooting Your Computer
You can troubleshoot your computer using indicators like Diagnostic Lights, Beep Codes, and Error
Messages during the operation of the computer.
Power LED Diagnostics
The power button LED located on the front of the chassis also functions as a bicolored diagnostic LED.
The diagnostic LED is only active and visible during the POST process. Once the operating system starts
to load, it is no longer visible.
Amber LED blinking scheme – The pattern is 2 or 3 blinks followed by a short pause then x number of
blinks up to 7. The repeated pattern has a long pause inserted in the middle. For example 2,3 = 2 amber
blinks, short pause, 3 amber blinks followed by long pause then repeats.
Table 14. Power LED Diagnostics
Amber LED State White LED State Description
off off system is OFF
off breathing system is in sleep state
blinking off power supply unit (PSU) failure
steady off PSU is working but failed to fetch code
off steady system is ON
Amber LED State Description
2,1 system board failure
2,2 system board, PSU or PSU cabling failure
2,3 system board, memory or CPU failure
2, 4 coin-cell battery failure
2,5 corrupt BIOS
2,6 CPU configuration failure or CPU failure
2,7 memory modules are detected, but a memory failure
3,1 possible peripheral card or system board failure
3,2 possible USB failure
3,3 no memory modules are detected
3,4 possible system board error
3,5 memory modules are detected, but a memory configuration or compatibility error
51