[nebudchadnezzar]

Been getting this exact same issue for a long time !
It does it at random, sometimes its fine, sometimes its just completely unwatchable, like trying to watch digital TV with almost no signal
I have reported this before, but every time i do they "cant find anything wrong"
A few times i have unplugged the STB for a few hours and left it, when you plug it back in the on demand works fine, but the problem comes back after a while, this leads me to think there is a problem with the STB itself (old silver samsung)
I guess the next step is try to get an engineer to swap out the box