[mythtv-users] Prb with HD3000 HDTV and Comcast cable

[Jim Marshall]

I have an Intel p4 2.8 gHZ machine (hyper threading is disabled - ASUS P4S800X-D motherboard), with 1 gb RAM, with a WD 250MB SATA HD and an nVidia GeForce 6200 fanless video. The machine has 2 pvr 150's installed and 2 pcHDTV HD3000 installed. The 2 pvr 150's are hooked up to comcast cable (no cable box) and work great. One of the hd3000 is hooked up to an over the air antenna and works fine. The other HD3000 is hooked up to comcast cable (again no cable box), I am having problems with this. It seems to pick up the channels without any trouble (QAM256) but when I try to tune into the channels it is very choppy, both sound and video.

I am using MythDora 5.0 (base install, no updates). It was indicated to me (on the MythDora forums) that HD3000 QAM module may have issues with a lack luster power supply. So I bought a "Antec Neo Power 500" and replaced the 350W one that was in the system. But this has had no affect on the performance.

I am using the 'slim' playback mode. 

I am hoping that your not going to say I need a better CPU, but would anyone have any ideas what I can do to rectify this? Isthere any other info I could provide to help t-shoot this?

Thanks
Jim