Samsung SP-R4232 42 in. Plasma HDTV "comcast channels dont sound" Questions

...comcast box for about 1 minute, plug it back in and be patient while it re-boots, can take as long as 4-5 minutes, this re-sets all the logic states in the box, hope this helps. make sure u dont have ...

to waste my money if there is a simple solution. Also I am using Comcast HDTV box with the tv. Sounds like to me the comcast HDTV box is the issue if you are using that to change channels. Let me know