Same issue as everyone on this string......with a twist. OTA channels won't play when the 2 TB expansion drive is plugged into the Tablo USB. With the device unplugged, everything works as it should. The audio settings work around made no difference in my environment.
Two Roku's and a Tablo. All devices are two weeks old and on the latest software. Expansion device is a Seagate 2TB disk drive, USB interface.
Here is my info, same problem on my Sony tv.
@Masswood, you need to read the thread. Roku isn't going to do anything about it. You have to wait for Tablo to come up with a workaround.
I guess it’s time to give up on Roku
If your Rokus are only two weeks old, you should return them and get another device like Google Chromecast. Mine are too old to return or I would. Good luck!