ASUS ExpertCenter D9 SFF (D900SA) User Manual
![ASUS ExpertCenter D9 SFF (D900SA) CPU manual cover](/images/fZJhkjLyKFupsxVwWtPGHZsA/thumbs/thumb175x175.webp)
To upgrade the RAM, first ensure the computer is powered off and unplugged. Open the chassis by removing the screws on the back panel. Locate the RAM slots on the motherboard, and insert the new RAM module by aligning it with the slot and pressing down until it clicks into place. Close the chassis and power on the system to ensure the new RAM is recognized.
Check if the power cable is securely connected to both the power outlet and the computer. Ensure the power outlet is working by testing with another device. If the issue persists, open the case to check for any loose cables or connections inside. If none of these solutions work, consider contacting support for further diagnosis.
Turn off and unplug the computer before cleaning. Open the chassis and use compressed air to gently blow dust from internal components, including the fans and vents. Avoid touching the components directly and ensure the computer is completely dry before reassembling and powering it back on.
To reset the BIOS, restart the computer and press the "Delete" key during boot to enter the BIOS setup. Navigate to the "Exit" menu, and select "Load Setup Defaults" or "Reset to Default". Confirm your choice and save the changes. The system will restart with default BIOS settings.
Visit the ASUS support website and navigate to the downloads section. Enter the model number, D900SA, and download the latest drivers. Run the installation files and follow the on-screen instructions to update each driver. Restart the computer after the updates.
Ensure the computer is powered off and unplugged. Open the chassis and locate the hard drive bay. Disconnect the cables from the current drive, unscrew it, and remove it from the bay. Place the new hard drive into the bay, secure it with screws, and reconnect the cables. Close the chassis and boot the system to set up the new drive.
The ASUS ExpertCenter D9 SFF (D900SA) supports low-profile graphics cards. Open the chassis and locate the PCIe slots. Insert the new graphics card into an available slot and secure it with a screw. Connect any necessary power cables, close the chassis, and install drivers for the new card after booting.
Ensure all vents are unobstructed and clean. Verify that fans are operational and consider replacing thermal paste on the CPU if necessary. Use monitoring software to check temperatures and ensure the system is not placed near heat sources.
Check the connection between the computer and monitor, ensuring cables are securely attached. Test with another monitor or cable if possible. Verify that the monitor is on and set to the correct input. If using a graphics card, ensure it is properly seated in the PCIe slot.
Restart the computer and press "F9" during boot to access the recovery partition. Follow the prompts to restore the system to factory settings, keeping in mind this will erase all data. It is recommended to back up important files before proceeding.