I have a TV Roamio TCD846500 that has started freezing when watching live TV. I can play a recorded show without the freezing. The freeze lasts about 13 seconds and happens about every 2 minutes. My MBT is 45-46 and I have good circulation around the TIVO. The fan is working and I have tried a different plug in power supply. I did not see any swollen caps on the internals.