I have a 19" CRT Sony Trinitron Monitor. I have had this monitor for about 4 years and now all of a sudden when I turn it on with the computer from a cold boot. I can seen yellow upward sloping horizonal lines only really noticable from a black screen. like the boot screen and windows startup. The only good thing is they go awhile in a matter a mintues I'm assuming as the monitor heats up. my question since it has never done this before does this mean my monitor is going bad or starting down this path?