I have a Roku Express and do not get any audio in the APP or the channels. Only audio is from the bouncing ROKU on startup.
Television is a TCL model 48FS4610
I have attempted all other posts suggestions. Played with all the audio settings in the TV settings as well as ROKU Settings. I have restarted the TV to default mode as well as restarting the ROKU.
I have switched HDMI cables and HDMI ports, including into the "dedicated" ROKU HDMI port on the TV.
Other devices such as my Chome Cast works perfectly on this TV.
I have no type of surround sound or sound bar, just the TV speakers.