This is very much unchartered territory for me, so please be gentle.

I've set up a HTPC: GB-PVR (on WinXP) is all installed with two Hauppauge HVR-3000s, watching Freeview DVB-S (thanks psycik for all your help) and works well.

I'm running an s-video cable from the computer to the TV, the issue is the picture is jumpy.  It moves up about a 1mm then down 1 mm five or six times a second.  If I swap in a s-video to composite connector (I thought it might be a faulty s-video plug on the TV) I get the same result.

Video card is a Nvidia Geforce FX 5900XT, TV is a Samsung Plano CS-68k3nt.  What settings should I change to try and rectify this?  I'd also be keen to hear what settings I can change to make the EPG readable, as the picture looks fine but the EPG is distorted and small.

Second question, I notice all the HTPC cases that other users have, I'm running my HTPC in my bedroom, can you get a fanless case to quieten down the noise?  What would you suggest to stop the hum?