Hi folks. I’m having problems with picture freeze, picture stutter, lag and then catchup. Occasionally the screen goes black for 3 seconds and then snaps back into life. I tried adjusting the buffer size but when I do that the whole system locks up and I can’t use any of the controls on the remote. I unplug and plug back up and then the system starts again. Anyone heard of the buffer size not functioning in advance settings of mag box 254? Many thanks in advance for any tips . Best wishes