The problem is, for example when i'm using my laptop via AV3(optical from tv to opt2 on amp) and then change to AV2 to watch tv i get about 4 times out of ten a blank screen then green or sometimes pink followed by snow,and i have to turn the amp off with the remote then back on and it's fixed.Finding this quite annoying. I'm using a harmony 700 remote.I've tried connecting my laptop to the amp but it wont work.