If you still need the official file, enter your (not just the motherboard code) on Acer’s support site and download the Service Guide . That document contains 99% of what the standalone AAHD3-VC motherboard manual would include.
A: Rev 1.0 has different audio codec (ALC662) and sometimes missing PCIe x1 slots. Layout is nearly identical.
Before performing any hardware changes, download a copy of the BIOS configuration screens or print this article. A single misplaced jumper or wrong RAM slot can lead to hours of frustration.