Playback Issues - Audio/Video & Power

[nv1]

Using Roku Express+ 2810, composite output with traditional analog TV (AV input, stereo). Was working ok until a few days ago when the audio went out of sync by a few frames. I've tried fiddling with audio settings, resetting device, checked that software is up to date, etc, but still can't get it to sync. Obviously I'm not an experience streamer, but this happens on Roku Channel, Criterion Channel, TCM and Amazon Prime Video; those are the only ones I watch but I assume it's the same on other channels. Any way to fix this on my device? Thanks. 

[nv1]

correction: Model is 3910 RW 

[nv1]

Audio still out of sync on IMDB TV & Amazon Prime shows. 

On Perry Mason episodes on IMDB TV, the audio is WAY out of sync!

Seems to happen after first ad break or when you pause or rewind. Once it starts, ALL episodes out of sync and no way to fix it. 

[nv1]

Using Roku Express+.... 

On Perry Mason episodes on IMDB TV, the audio is WAY out of sync! Seems to happen after first ad break or when you pause or rewind. Once it starts, ALL episodes out of sync and no way to fix it. 

I'm still having sync issues with most Amazon Prime or IMDB TV programs. Have tried rebooting & updating device, restarting app, audio settings, etc but nothing changes.