Hello all, new here. I have a 2019 43" P8M connected to a Samsung Q600A soundbar(new). Firmware version was V634 if I remember correctly (much has passed in the last 2-3 days).
Digital audio out was set on Auto but had bad lip synch issues. Could not hear anything when setting to Passthrough or PCM. So I decided to take the plunge and update and, of course, messed that up.
Tried to do the OTA update to V727 at first but install got hung at about 30% so pulled the plug on the tv, removed the USB and deleted contents. Then downloaded the IMG file of V713(?) And successfully installed that. THEN installed the V727 OTA, successfully this time! YAY!
I then tested the set. App audio was good! I was also now finding and seeing/hearing Dolby Atmos on Netflix which I wasn't finding before. BUT, all channel audio was very, very, very quiet no matter what I set Digital Audio on, even the Auto option which worked before.
I then re-read this thread and noticed I hadn't done either of the recommended resets. I then found and performed a Reset Store (didn't find the Reset All at first), then a Reset All and then another Reset Store. Restarted the TV and voila, I had my audio back! And better yet, my lip synch issues are now minimized!
Everything is working and I have found a couple of settings I didn't have before. Even saw a 'Works with Alexa' setting for a while but said not installed when I tried to enable it. It is gone now.
Applied the picture settings posted a while back with some tweaking on my part and am enjoying the set much more now with fewer frustrations.