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Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
U needed CRT coolant,U have a halo white screen too?Try this wbsite.Tv repair World.com check it out buy and replace the coolant or convergence kit,must know how do soldering to change convergence parts.Or if u have any colors lines mismatch at all than it the convergence.
You cannot clean the insides. The are sealed if you attempt to remove them, which is a big job in itself, you run the risk of damaging the seal and allowing water and moisture to get inside which could lead to more problems. What I would recommend is to visit your local parts store, and pick up a bottle of Maguire's cleaner wax. Apply some of the wax directly on the headlamps and with a terry cloth or a microfiber cloth rub the wax in real good with a little bit of pressure. Allow the wax to cure and then polish it off with a dry part of the towel. Generally these headlamps oxidize and causes this foggy or cloudy appearance.
If this is a projection TV, first you should check you lamp. Is it good (clear) or bad (foggy). If foggy, you should replace it. If it is good (clear) reseat it back onto the ballast (it just might be loose). If you are still having this problem, you probably need to replace the ballast
TV FINE UNTIL 2 NIGHTS AGO HAVE HAD 4 YEARS, STARTED HAVING A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. HAS SOUND
A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. called retrace lines please check
1 screen control on eht transformer is mituned
2 supply to screen of crt
3 supply to rgb video output is absent
4 connector loose
5 crt base loose