Contents

Contents
Notes, Cautions, and Warnings
Working on Your Computer
- Before Working Inside Your Computer
- Recommended Tools
- Turning Off Your Computer
- After Working Inside Your Computer
Cover
- Removing the Cover
- Installing the Cover
Front Bezel
- Removing the Front Bezel
- Installing The Front Bezel
Expansion Card Tab
- Removing the Expansion Card
- Installing The Expansion Card
Optical Drive
- Removing the Optical Drive
- Installing The Optical Drive
Hard Drive
- Removing the Hard Drive
- Installing The Hard Drive
Memory
- Removing the Memory
- Installing the Memory
Chassis Intrusion Switch
- Removing The Chassis Intrusion Switch
- Installing the Intrusion Switch
Speaker
- Removing The Speaker
- Installing the Speaker
Heat Sink And Processor
- Removing the Heat Sink and Processor
- Installing the Heat Sink and Processor
Coin-Cell Battery
- Removing The Coin-Cell Battery
- Installing The Coin-Cell Battery
Power Switch Cable
- Removing the Power-Switch Cable
- Installing the Power-Switch Cable
Front Thermal Sensor
- Removing the Front Thermal Sensor
- Installing the Front Thermal Sensor
System Fan
- Removing The Chassis Fan
- Installing the Chassis Fan
Input/Output Panel
- Removing the Input/Output Panel
- Installing the Input/Output Panel
Power Supply
- Removing The Power Supply
- Installing the Power Supply
System Board
- Removing The System Board
- Installing the System Board
System Setup
- System Setup
- Boot Menu
- Boot Menu Enhancements
- Timing Key Sequences
- Beep Codes and Text Error Messages
- Navigation
- System Setup Options
Troubleshooting
- Diagnostic LEDs
- Beep Codes
- Error Messages
Specifications
- Specification
Contacting Dell
- Contacting Dell

Dell OptiPlex 390 Mini Tower Owner's Manual

Dell OptiPlex 390 Mini Tower Desktop manual cover

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Dell OptiPlex 390 Mini Tower Desktop Specification

The Dell OptiPlex 390 Mini Tower Desktop is engineered to provide robust performance and flexibility for business environments. Powered by Intel's second-generation Core processors, including options such as the Intel Core i3 and i5, the system ensures efficient multitasking and reliable performance. It supports up to 8GB of DDR3 SDRAM, allowing for smooth operation of applications and processes. The desktop features integrated Intel HD Graphics, with expansion options available via its PCI Express slots, which accommodate additional graphics or other peripheral cards. Storage capabilities include a SATA 3.0Gb/s hard drive, with capacities typically ranging from 250GB to 1TB, ensuring ample space for data and applications.

Connectivity is facilitated through multiple USB 2.0 ports, Ethernet LAN, and audio jacks, supporting a wide range of devices and network configurations. The system includes a DVD-ROM or DVD+/-RW drive for optical media access. Security features such as chassis intrusion alerts and optional data encryption enhance data protection. The OptiPlex 390's mini tower design allows for easy access to internal components, promoting straightforward upgrades and maintenance. It operates on Windows operating systems, with options for Windows 7 Professional or Windows 8 Pro. Energy efficiency is supported through compliance with Energy Star standards and an optional 90% efficient power supply, reducing operational costs while supporting corporate sustainability goals. Overall, the Dell OptiPlex 390 Mini Tower Desktop offers a balanced blend of performance, expandability, and manageability tailored for business productivity.

Dell OptiPlex 390 Mini Tower Desktop F.A.Q.

How do I reset the BIOS password on a Dell OptiPlex 390 Mini Tower?

To reset the BIOS password, you need to open the case and locate the password jumper on the motherboard. Move the jumper to the reset position, power on the system, and then return the jumper to its original position.

What type of RAM is compatible with the Dell OptiPlex 390 Mini Tower?

The Dell OptiPlex 390 Mini Tower uses DDR3 SDRAM. It supports non-ECC dual-channel DDR3 DIMMs. Ensure that the RAM speed is compatible, such as DDR3-1333 or DDR3-1600.

How can I improve the performance of my Dell OptiPlex 390?

To improve performance, consider upgrading the RAM, replacing the HDD with an SSD, and ensuring that all drivers and BIOS are up to date. Regularly clean the interior to prevent dust buildup.

What should I do if my OptiPlex 390 does not power on?

Check the power cable connections, ensure the power outlet is functional, and inspect the power supply unit. If it still doesn't power on, test with a known-working power supply.

Can I upgrade the graphics card on the Dell OptiPlex 390 Mini Tower?

Yes, you can upgrade the graphics card. Ensure the new card is compatible with the PCIe slot and that your power supply can handle the additional power requirements.

How do I clean the inside of my Dell OptiPlex 390?

Turn off and unplug the computer. Open the case and use compressed air to gently blow out dust from fans, vents, and components. Avoid touching the components directly.

What are the steps to update the BIOS on a Dell OptiPlex 390?

Download the latest BIOS update from Dell's official website. Run the executable file, follow the on-screen instructions, and ensure the computer doesn't lose power during the update process.

How can I restore my OptiPlex 390 to factory settings?

To restore to factory settings, use the Dell Backup and Recovery Manager to create a recovery media, then boot from it and follow the prompts to restore the system.

What are the common causes of overheating in the Dell OptiPlex 390?

Common causes include dust buildup, failing fans, poor ventilation, or a degraded thermal paste. Regular cleaning and ensuring proper airflow can help prevent overheating.

How do I add a second hard drive to my Dell OptiPlex 390 Mini Tower?

Open the case and locate an available drive bay. Secure the new drive in the bay, connect it using a SATA cable to the motherboard, and connect the power cable from the power supply.