LG TV SJ800V. (2018 UK model). Was 06.00.20 then became 06.00.25 and made no difference to this issue:
Search page on YouTube had a microphone symbol. This enabled Voice Search.
Just recently, (whilst being 06.00.20), MICROPHONE VANISHED. It can't be got back. I know of two other SJ800V TVs with the same issue.
I know of another two similar LG TVs - but different model numbers - which have no problem.
LG says it's probably a YouTube issue. Tried uninstalling and re-installing YouTube but no good...
What can be done? This TV is only 4 years old and I and I really don't see why I should have to go and buy a new one...