Welcome to 7 forum fishinman...

Make sure HDMI audio is enabled in the source digital device and the audio connection is plugged into the correct DTV audio out connector. If you are using a DVI-to-HDMI adapter you must connect separate audio cables from the device that is sending the audio and video signal into another device that is capable of playing audio (this may be the TV or Monitor also used to display video if the device has speakers and separate audio inputs).
If you are trying to send audio through HDMI from a PC, make sure any onboard-audio setting in the BIOS is set to Auto and make sure HDMI audio is selected as the main audio output in the operating system (for example, Windows Audio Properties in Control Panel).
I also want to know does the speakers work fine on HDTV monitor & HP Pavilion individually???
Lets know if this doesn't resolve the issue, so, we can check further...