Doesn't anyone even bother to read some of the recent postings or do a
Google Groups search before asking the same question?

This happens ALL the time. Take the recent Sony low volume sound
issue. There has been a thread going for a couple of days with all the
information for the common problem, and someone posts the exact same
question for an almost identical model number today. A quick Google
search for "Sony low volume" brings up lots of hits as well.

Either people are too dumb or lazy to read recent posting, or they
simply do not know how to use a computer search engine. I am not sure
I would want anyone trying to fix a tv set that cannot figure out how
to read or use a search engine. It does take some basic minimal
technical skill to use a search engine, far less than actually working
on a tv set.