I've been very satisfied with my FVP 4000T, but just recently, on starting up the FVP and the TV, I'm getting interference on sound and vision, with the TV switching itself off and on again a couple of times before everything settles down, and then it's back to normal.
I've tried re-setting the TV Power On/Off in the FVP (I didn't have it set to that, but this happens irrespective of whether it's on or off), and it doesn't look as though it's related to the FVP connecting itself to Wifi.
I'm at a loss to know why it's suddenly started happening - there's nothing else I can think of in the settings menu that would cause this. Is it something to do with the most recent software update? Might it be that some neighbour's wifi-connected equipment is somehow trying to communicate with it?
I should add, the TV is a Samsung, several years old, but the two have worked together well through an HDMI connection, indeed the SD picture from the FVP looks better, never mind the fact that the FVP now lets me see HD channels through the Samsung. Sound output from the TV is connected through my hifi, and that hasn't changed since I got the FVP.