The manual clearly states that the front panel header supports , not HD Audio. You will need to change your case’s audio cable from the "HD Audio" plug to the "AC’97" plug (if your case supports it) or manually re-route pins 1-10.
The is a legacy Micro-ATX motherboard based on the Intel 915G chipset . It was commonly found in Acer Aspire and Veriton desktop systems from the mid-2000s. Technical Specifications CPU Socket: LGA 775 (Socket T). acer socket lga775 pcie motherboard 915m08g8ks manual
While we are hunting for the official PDF, we can reconstruct the official specifications based on the actual board layout and Intel’s 915G reference design. The manual you seek will confirm these specs: The manual clearly states that the front panel
This board is obsolete for modern gaming or high-performance tasks. It lacks support for modern multi-core CPUs (like the Core i-series) and uses slower DDR2 memory. It was commonly found in Acer Aspire and