Thanks for the quick replies!
The TVs are LGs...I'm not sure of the model number but will get it. The cable box is a hospitality specific "set back" box made by ADB called the CVS (Commercial Video Solution). Honestly, I'm surprised such a new HD box even has a mini plug to RCA output.
When we tried putting the video through an HDMI to DVI cable and leaving the red and white RCA connections hooked up in hopes that would carry the audio, we did get the video but the audio did not come through. When all 3 RCA connections are made the TV is on the "AV1" input and when we tried the DVI connection we had to change the input to "DVI" so I assumed that was why we were not getting the audio. But, as mentioned above, I thought that would work since DVI carries video only and the audio has to come from somewhere. and the only alternative was the RCA cables. Any ideas as to why that didn't work wold be appreciated as well.
Also, I do recognize that the quality of picture we're currently seeing through the RCA cables is not HD, but as of now it's the only way we can use the TVs at all.