PC connected using HDMI Cable to the HDMI1 DVI.

I have my Laptop connected to the TV using a HDMI cable, It is connected to HDMI1/DVI. Both the video and audio from the Laptop were seen and heard through the TV. But now I can see the picture but there is no audio. I did edit the source name from HDMI/DVI to PC. I did this between the time that the Audio worked and now. Would this have caused the loss of Audio?, if so how do I edit the source name back to what it was. If not what else can I try.