I have a Philips 37" LCD. I'm not to savvy with all the tech talk but I'm hoping someone can help me out. I have basic cable running directly into the tv and I can pick up about a dozen HD broadcasts with the built in tuner. They are odd numbers for the channels such as 115.211 . I upgraded the firmware via the usb port on my tv a few months ago and I noticed that half of these HD channels have no volume at all anymore. The Philips website has a new firmware update that I loaded but it didn't fix this problem. Does any one have any ideas why I have no volume on these HD channels anymore? Is there a place where I can find the old firmware for my LCD since Philips doesn't have it on there website anymore? It really sucks to be able to view the high def picture on channels such as TNT but not have any volume.