This means the internal clock battery has died. Replace the old battery with a fresh . Upgrade Path Limitations

If your motherboard is not recognizing 4GB, check that the BIOS is updated and that you are using DDR2 667/800MHz sticks. Some users have reported issues with high-density RAM modules. 3. Expansion Slots and Graphics

Connect the Case Power Button. Orientation does not matter. Pin 9: Key (Reserved / Missing pin). Pin 10: Ground / No connection. Upgrades and Modern Practicality

While designed for Windows Vista/Windows 7, the motherboard can run Windows 10 (32-bit or 64-bit) with generic drivers.

According to schematics , the front panel header is located at the bottom right corner of the board. ATX Power: 24-pin connector. CPU Power: 4-pin P4 connector. Fan Headers: 1x CPU Fan (4-pin), 1x System Fan.

Since this is an OEM board, the most reliable documentation is often found within the specific PC model's support page: Acer Support Drivers and Manuals Enter your PC's Serial Number for the most accurate documentation.