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
Amber LED State Description
3,6 possible system board resource and/or hardware failure
3,7 some other failure with messages on screen
Beep Code
The computer can emit a series of beeps during start-up if the display does not show errors or
problems. These series of beeps, called beep codes, identify various problems. The delay between each
beep is 300 ms, the delay between each set of beeps is 3 sec, and the beep sound lasts 300 ms. After
each beep and each set of beeps, the BIOS should detect if the user presses the power button. If so,
BIOS will jump out from looping and execute the normal shutdown process and power system.
Code 1-3-2
Cause Memory failure
NOTE: 1. If the system is attached with an internal speaker we can hear the beep sound directly.
NOTE: 2. If the system does have an internal speaker, connect an external speaker to line out
connection to hear the beep sound.
NOTE: User can also check the power LED behavior instead of the beep code for troubleshooting
purpose.
Error Messages
Error Message Description
Address mark not
found
The BIOS found a faulty disk sector or could not find a particular disk sector.
Alert! Previous
attempts at
booting this
system have failed
at checkpoint
[nnnn]. For help in
resolving this
problem, please
note this
checkpoint and
contact Dell
Technical Support.
The computer failed to complete the boot routine three consecutive times for the
same error. Contact Dell and report the checkpoint code (nnnn) to the support
technician
Alert! Security
override Jumper is
installed.
The MFG_MODE jumper has been set and AMT Management features are disabled
until it is removed.
Attachment failed
to respond
The floppy or hard drive controller cannot send data to the associated drive.
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