The Acer AAHD3-VC motherboard is a bit of a "ghost" in the tech world. Because it is a proprietary model—meaning it was built specifically for pre-assembled Acer desktops like the Aspire ATC-105-UR11—Acer does not release a standalone public manual for it.

• Reseat display cable; test with external monitor to isolate GPU/display cable.
• For GPU failure, look for cracked solder joints near BGA or broken traces.

| Pin | Signal | Function | Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | HDD_LED+ | Hard Drive Activity (+) | Red | | 2 | PWR_LED+ | Power LED (+) | Green/White | | 3 | HDD_LED- | Hard Drive Activity (-) | White | | 4 | PWR_LED- | Power LED (-) | Black | | 5 | GND | Reset Ground | Black | | 6 | PWR_SW# | Power Switch (+) | Yellow | | 7 | RESET# | Reset Switch (+) | Blue | | 8 | GND | Power Ground | Black | | 9 | NC | Not Connected / Reserved | Empty | | 10 | NC | Not Connected | Empty |

is possible but requires a much better cooler than the stock Acer heatsink. 💾 Storage & Power SATA Ports: Usually 4x SATA 3.0 Gb/s or 6.0 Gb/s ports.

Disclaimer: This board uses proprietary front panel connectors in some Acer cases. If you are transplanting this board into a standard PC case, you may need to solder your own header pins or use a jumper wire to bridge the power switch pins to turn the system on.

For optimal performance, this motherboard features four slots that support DDR3 SDRAM. Maximum Capacity: Supports up to 32GB of RAM.