So I have looked at these forums for a while and finally decided to make an account and ask some Q's. I have looked around here for answers to my problem but to no avail. So I have a Viewsonic PJD5123 that I bought a few years ago and now i want to hang it in my fitness room. I have HD cable from comcast but all the other tvs in my house have comcast boxes. I do have a coaxial plug in the fitness room. So my question is can I connect my projector to the coaxial in the room with some sort of aftermarket converter and get hd channels or is it not worth it on my projector. Or do I have to buy yet another comcast box. Your help is greatly appreciated.