[Hornet]

My picture started breaking up on sky sports news today, no other channels turned box off for an hour returned all fine.

Tonight all channels pixellated and breaking up. Power off , came back still breaking up. Took card out of back and wiped, now fine. Could it be the card. Or is the box on its way out? Seemed to be wprse when I moved the cable wire going into back right, so thought it that, but once card repalced if I moved cable nothing happended! Picture fine, so no idea what it is?

Thanks