Hello all! First post... anyways I was reading the Boo,Hisss topic http://www.toughbooktalk.com/viewtopic.php?f=2&t=2741
and it seams I have a different problem than the OP but you might have hit the nail on the head of my problem. My screen gives out a high pitched squeal when its cold or I have the brightness turned up too high, goes away when screen is off. It usually goes away though after a few minutes. Would that be my LCD converter? I noticed my screen is slightly yellow too. Not sure if that is any helpful. I believe I have 16k hours on my book and it was refurbished but im thinking that may have been skipped if so.