1. Introduction
This manual provides essential information for setting up, operating, maintaining, and troubleshooting your Acer Aspire TC-390-UA92 Desktop PC. Please read this manual thoroughly before using your new computer.

Image: The Acer Aspire TC-390-UA92 desktop tower, accompanied by a wired USB keyboard and mouse.
2. Package Contents
Verify that all items listed below are included in your product package:
- Acer Aspire TC-390-UA92 Desktop PC
- Wired USB Keyboard
- Wired USB Mouse
- Power Cord

Image: The Acer Aspire TC-390-UA92 desktop tower shown with the included wired USB keyboard and mouse.
3. Setup Instructions
Follow these steps to set up your Acer Aspire TC-390-UA92 Desktop PC:
- Unpack the System: Carefully remove the desktop PC, keyboard, mouse, and power cord from their packaging.
- Connect Peripherals:
- Connect the USB keyboard and mouse to any available USB ports on the rear or front of the desktop.
- Connect your monitor to either the HDMI port or the VGA port on the rear of the desktop. Ensure your monitor is also connected to a power source.
- Connect to Power: Plug the power cord into the power connector on the rear of the desktop, then plug the other end into a grounded electrical outlet.
- Power On: Press the power button located on the front of the desktop tower. The system will begin to boot up.
- Initial Windows Setup: Follow the on-screen instructions to complete the Windows 10 Home setup process, including language, region, network connection, and user account creation.

Image: A detailed view of the Acer Aspire TC-390-UA92 desktop, highlighting the front panel with USB ports and optical drive, and the rear panel with various connectivity options including HDMI, VGA, and additional USB ports.
4. Operating Instructions
4.1 Power On/Off
- To Power On: Press the power button on the front of the desktop.
- To Shut Down: Click the Start button in Windows, then select Power > Shut down.
- To Restart: Click the Start button in Windows, then select Power > Restart.
4.2 Connecting to a Network
Your desktop supports both wired and wireless network connections.
- Wired Connection (Ethernet): Connect an Ethernet cable from your router or modem to the Gigabit Ethernet LAN port on the rear of the desktop.
- Wireless Connection (Wi-Fi):
- Click the Wi-Fi icon in the Windows taskbar.
- Select your desired Wi-Fi network from the list.
- Enter the network security key (password) if prompted, then click Connect.

Image: A close-up of the Acer Aspire TC-390-UA92 desktop tower, illustrating its wireless (Wi-Fi 5) and wired (Gigabit LAN) connectivity options, along with Bluetooth 5.0 support.
4.3 Using USB Ports
The desktop features multiple USB ports for connecting various devices:
- Front USB Ports: Two USB 3.2 Gen 1 ports for convenient access.
- Rear USB Ports: Two USB 3.2 Gen 1 ports, two USB 3.2 Gen 2 ports, and two USB 2.0 ports for connecting printers, external drives, and other peripherals.
4.4 Using the DVD-RW Drive
The 8X DVD-Writer Double Layer Drive (DVD-RW) allows you to read and write CDs and DVDs.
- To Open: Press the eject button on the drive tray.
- To Insert Disc: Place the disc onto the tray with the label side facing up, then gently push the tray back into the drive.
4.5 Audio Connections
The desktop supports High Definition Audio with 5.1-Channel Surround Sound. Audio jacks are typically located on the front and rear panels for headphones, microphones, and speakers.

Image: A close-up of the lower front panel of the Acer Aspire TC-390-UA92 desktop, emphasizing its High-Def Audio capabilities with 5.1-Channel Surround Sound Support.
5. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your desktop PC.
- Cleaning:
- Use a soft, dry cloth to clean the exterior of the desktop.
- For dust accumulation in vents, use compressed air. Ensure the system is powered off before cleaning.
- Software Updates: Regularly check for and install Windows updates and driver updates for your components (e.g., graphics, chipset) to ensure system stability and security.
- Data Backup: Periodically back up important files to an external drive or cloud storage to prevent data loss.
- Environmental Conditions: Operate the desktop in a well-ventilated area, away from direct sunlight, heat sources, and excessive dust.
6. Troubleshooting
This section addresses common issues you might encounter with your desktop PC.
6.1 No Power
- Ensure the power cord is securely connected to both the desktop and a working electrical outlet.
- Verify the power outlet is functional by plugging in another device.
6.2 No Display on Monitor
- Check that the monitor's power cable is connected and the monitor is turned on.
- Ensure the video cable (HDMI or VGA) is securely connected to both the desktop and the monitor.
- Try connecting the monitor to a different video output port on the desktop, if available.
- Confirm the monitor's input source is set correctly (e.g., HDMI 1, VGA).
6.3 No Internet Connection
- Wired: Check if the Ethernet cable is properly connected and if your router/modem is working.
- Wireless: Verify that Wi-Fi is enabled in Windows and you are connected to the correct network with the correct password. Restart your router/modem if necessary.
6.4 Keyboard or Mouse Not Responding
- Ensure the USB cables for the keyboard and mouse are securely plugged into the desktop's USB ports.
- Try plugging them into different USB ports.
- Restart the computer.
For further assistance, refer to the support information in Section 8.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | TC-390-UA92 |
| Operating System | Windows 10 Home |
| Processor | AMD Ryzen 5 3400G Quad-Core (3.7GHz, up to 4.2GHz Max Boost) |
| Graphics | AMD Radeon Vega 11 Graphics (Integrated) |
| RAM Memory | 12GB DDR4 2666MHz (Max 64GB) |
| Storage | 512GB NVMe M.2 SSD |
| Optical Drive | 8X DVD-Writer Double Layer Drive (DVD-RW) |
| Wireless Connectivity | 802.11ac Wi-Fi 5, Bluetooth 4.2 LE |
| Wired Connectivity | 10/100/1000 Gigabit Ethernet LAN (RJ-45) |
| USB Ports | 4x USB 3.2 Gen 1 (2 Front, 2 Rear), 2x USB 3.2 Gen 2 (Rear), 2x USB 2.0 (Rear) |
| Video Output | 1x HDMI, 1x VGA |
| Audio | High Definition Audio with 5.1-Channel Surround Sound Support |
| Power Supply | 250W |
| Dimensions (H x W x D) | 13.78 x 6.42 x 13.39 inches (350 x 163 x 340 mm) |
| Weight | 17.2 lbs (7.8 kg) |

Image: The Acer Aspire TC-390-UA92 desktop tower shown with its physical dimensions: 13.78 inches (height), 6.42 inches (width), and 13.39 inches (depth).
8. Warranty and Support
8.1 Warranty Information
Your Acer Aspire TC-390-UA92 Desktop PC comes with a 1 Year Parts and Labor Limited Warranty. This warranty includes Toll-Free Tech Support. Please refer to the warranty card included with your product for full terms and conditions.
8.2 Technical Support
For technical assistance, warranty claims, or further inquiries, please contact Acer customer support. You can find contact information and additional resources on the official Acer website: