Hi CrunchyThunder and welcome to Windows 7 Forums
Unfortunately, I cannot ascertain whether you have Realtek audio or some other audio device (other than the HDMI output, which, as you say, is working). A quick search on the model number, vcpsa 390x
, reveals it to be a Sony laptop, however no audio information is available.
With reference to Hardware Identification
, can you supply the information shown in RED and BLUE for each item shown in the Sound, video and game controllers category.