I am having similar problems to other VM TiVo customers
The picture pixelates, freezes, and then goes blank...prompting the TiVo box to put an on screen message to check the signal.An engineer did call out and said there wasn't a fault but did change the box. The problem still exists ! Curiously when I have also been using a tablet, this freezes at the same time
The problem usually exists in the evening, but its now creeping into daytime tv too.... !