Edit by Chris :
ChrisTV Professional and Standard version 4.70 and higher have support for ATI Theater 550 PRO.
Please check this topic for Step by Step settings guide : http://forum.chris-tv.com/index.php?showtopic=1827
I've downloaded both ChrisTV 4.5 Lite and Pro. I started with the Pro version (freeware). Installation went ok but whenever I try to scan channels, I don't see them appear on the screen. The funny thing is that the program shows that it found channels. Then, when I return to the preview, I can hear the sound of every channel but no video, just a black screen. By mistake I clicked ont the Teletext button and an image appeared. But the switching channel option did not work after that.
After all frustration I tried the Lite version. No problems at all. Everything's OK.
I 've tried all Rendering options, all the solutions I could find from the forum.
I also tried a Hauppauge 350 and It works.
Is it because Theater 550 is not fully supported in the 4.5 version.
I need to know of it going to work in order to decide whether to buy it or still using the crappy PowerCinema 3.