I can't get remote to work. New batteries and yes stb button on. last night when dn down, i tried checking old bns. Ever since, nothing works. Can't get new fix to load from usb. i have turned off receiver at back put in usb then turned back on at back and the receiver says ON then the last channel number comes up. nothing on the tv. searching signal and also window saying initalizing usb port. I have tried everything I know and some other things other people have suggested. Any ideas???