I recently purchased a Acer Aspire TimelineU M5-481TG-6814, only to discover that the sound isn't working. Through my research, it seems that the most probable cause is that the onboard audio is disabled in the BIOS. However, the option to enable the onboard audio just isn't present in the BIOS.

So my question is: is there any way of accessing such settings in the BIOS?

Some extra information: link my purchase
System BIOS version: InsydeH20 Setup Utility Rev3.7, V1.05