Based on a simple google search
"LG TV reliability ratings"
I found this
http://www.pcworld.idg.com.au/article/409931/who_makes_most_reliable_tv_/
and this
http://www.jdpower.com/press-releases/2013-high-definition-television-hdtv-satisfaction-report
just on the first page that could counter the "Low Grade", or "reliability problems comment.
when I googled LG tv reliability problems I found this
http://blogs.which.co.uk/technology/tvs/how-long-will-your-tv-last-we-can-tell-you/
If you look at this site it would posibly indicate a problem with LG tv's
http://www.consumeraffairs.com/home_electronics/lg-tv.html
However when you click the "compare companies" link you will notice no company has more then 2 stars, to include Sony, Samsung, Sharp, Vizio...
None of these studies would indicate LG having any sort of reliability problems...
You are free to do the same search I did and post contradictory results if you want, but I couldn't find any myself.
While I cant discount the bad experiences that people of this forum may have had, it really doesn't seem to be the norm as far as LG tv's are concerned.