I have been experiencing random drop outs on the RF pass through, The solution is, to use a splitter to feed the TV. The pass through is unreliable. Other posts have suggested that the remote recording app may interfere with the pass through. It would appear to be mainly a soft ware problem, that depends on how you have set up the box. Incidentally I am using the phono outputs to feed a RF modulator, these out puts only work when the box is in SD mode for the HDMI output