Mine spent it's entire life on it's side and never died. Clearly you lot are giving them plenty of room and fresh air rather than sticking them in the smallest of cramped places beside the TV.
FUCKING THiNG !!!!!!!!!!!!!!!!!
You could probably blag a free repair if its really only been 3 monthsIt won't be dust. I had it fixed for the same thing 3 months ago. It's cheap-ass Sony bollox is what it is.