Hello - I have a VIP211z receiver out in my shop that I installed a few months ago and up until yesterday it has been working perfectly. At some point yesterday, the picture started briefly freezing every 5 or 6 seconds. It only freezes for a quick flash (like a stutter) and then goes back to normal for another 5 or 6 seconds, etc....and then does it again and again. The audio is never interrupted, only the picture. I have 75% signal which is all I have ever gotten. I also switched out the HDMI cable to rule that out and can watch cable tv on the same tv without any issues so it's not the tv itself. I'm really just down to the coax which comes directly from the LNB to the receiver or the receiver. Has anybody experienced anything like this, and if so did you fix it? I searched the forum and haven't found a problem exactly like mine. Thanks in advance for your help and time!