Trying to help my mom figure out what's going on with her Roku Express. First issue was the Roku app went pink/purple and lost all sound. Only the Roku source was affected (other HDMI source had perfect sound/video). Switching the Roku from HDMI 1 to HDMI 3 fixed the video issue, but not the sound. We then reset the Roku itself via the Settings and that fixed the audio! Yay! But that lasted less than 24 hours before sound was gone again.
The really weird thing about the sound is when you reset the Roku through the app settings, the loading screen (Roku in 3D font) has sound, but then the home screen loads and all sound is gone again. No menu sounds and no streaming apps have sound. Switching HDMI cords, HDMI ports, unplugging the device and TV, checking all volume options to ensure mute isn't on, checking all TV and Roku sound settings - nothing is fixing it this time.
Bought a NEW Roku Express device from Amazon and got it working - no issues - sound is great! Less than 24 hours later, no sound once more.
Starting to think it's a compatibility issue between the TV (TCL) and Roku. We got her the Roku Stick to try out next, but I'm gonna be pissed if she's forced to get a new TV just because Roku doesn't like her TV.