I am having a problem with my Hughes HDVR2. The picture jumps/shakes horizontally at random intervals. Sometimes it will happen for a second or two, while at other times it will go on for up to a minute. Of course this is all sporadic, and I never know when it will happen. Sometimes it takes hours between the glitching.

Initially, I thought it might be the motherboard. However, I find that the picture shaking is being recorded, so I'm thinking it's the hard drive. Also, while watching a live program I can rewind to the spot in the buffer where the shaking took place. So, I am wondering if this is actually my hard drive or the motherboard?