Check the header is set to HD Audio (not AC’97) in BIOS (Advanced → Onboard Audio → Front Panel Type → HD Audio).

Before diving into jumper settings or BIOS updates, you must confirm you have the correct revision. The keyword "Q65H2-AM V11" contains critical information:

Download Acer Support Drivers and Manuals | Acer United States

The is a Micro-ATX motherboard typically found in OEM systems like the Acer Veriton S4610G . As a legacy board based on the Intel Q65 Express chipset , it supports 2nd Gen "Sandy Bridge" processors. While finding a physical or digital copy of the original user manual can be challenging due to its age, most of the essential technical data is documented via official Acer support and retro hardware archives. Core Specifications Overview Supported Specifications CPU Socket