i have a 13 yr old phillips 27 inch tv(1992 or so) and just recently i have noticed ill turn the tv on and all thesudden the picture is gone but i hear audio. so ill turn it off then back on a few times and itll finally come back but itll end up going away again. i think its the color tube..im not sure, i need advise...thank u...(sry for the inproper typing, broken thumbs suck..) -Shawn