I have the exact same problem in Kamloops. Pixilation and no sound occurring randomly only on recorded shows. I have had a technician out to the house and it is not a signal strength issue. I have had various other issues - it seems every week the pvr develops some new annoying issue (I have the 3510). I have decided to go elsewhere this spring when I can find some time to deal with changing providers. I was always loyal to Shaw until the purchase of this pvr and then seeing the hundreds of complaints over months and months, and yet Shaw continues to sell this problem ridden pvr.