Sharp Roku 50" LCDtv worked for 26 months now it gets to intermitent bar across bottom of screen which floats up lower 1/4 screen, only does this in Zoom (full screen Mode) something is causing signal leak, is it 5G interference? Sharp told me to watch it in Normal mode what is the point in having 50" TV that Zoom mode will not work, This Happens on standard TV Cable, The Streaming System works ok.