I bought a TSXR 507 before christmas after hearing it at Richer Sounds and after reading the reviews on here for it. On a few occasions I have found when watching Sky HD through it onto our Sony 40KDL V4000 TV the picture goes blank but the sound continues. To get the picture back you have to change the HDMI input to another selection ie: PS3 and then go back to Sky and then it's fine. I have swapped the HDMI cables around and nothing seems to solve it. Has anyone else had this issue or know why it's happening?