Hi! I hope you can help...I have an 15 year-old Sony Trinitron and recently the picture became distorted and there's snow. The sound, I assume because of the snow, has a buzzing to it. Also, until just yesterday, when the tv warmed up for a half hour or so, the picture would restore to normal. Now it remains fuzzy and warbly. Any ideas on how to fix this problem? Please help!