I'll try to keep this as short and concise as possible.
I recently bought a used RCA 52 Inch rear projection 4:3 HDTV off of craigslist for a pretty cheap price. I don't have the model number right now as I am away, but the tv is approximately 6 years old. From what I remember, the tv has 1080i but does not have 1080p or 720p. I have comcast, and got an hd box to use with the tv. The only hd source that the tv accepts is through component cables. When I first plugged it in through the composite cables, the picture was scrambled/jumbled and completely unwatchable. Now, the screen is completely black. However, when using the same component cables connected to an older dvd player, the dvd plays with no problems at all. I had another hd box being used with a seperate tv, so I switched them out to see if I had a bad box and still had the same problems. Right now I have the hd box connected to the tv through composite cables, but obviously am not watching it in hd.
Is there a setting on the cable box that needs to be adjusted to allow to the tv to accept the signal through the component cables? if so, how would this be done?
If nothing can be done to get the tv to work with component, is it even worthwhile to continue using the hd box if I only have composite cables connected to it? The hd channels do not appear to be any better than non-hd channels, and they do not even come in in the 16:9 format, they fill the screen (not sure if the image is cropped).