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The convergence circuit has failed. It is not a easy fix due to the tear down needed to get to the circuit area. I would call Mitsubishi at 18003322119 to get a Authorized Service Facility to check it out and give you a estimate of repair cost.
the picture tube is gone.
i repaired 150 sony xbr and kv series with that problem.sony has a single gun not three and has a great pix,but burn out faster.
there is a main screen control that you can adjust ,but the tube is gone.
on the back of the crt there is 3 gun drives r g b .
turn the color all the way down so it is black and white.
if there is a green ore purple tint,one gun is out of balance.
ajdusting the r g b controls so that black and white is normal is what you want to do.
the crt board has the screen bias voltage 800volts on it so be very careful and use an insulated screwdriver to adjust the drive controls.
if you have little knowledge about electronics, you have to open the back of your tv and adjust the focus adjustment located at the back of the flyback transformer the large black colored like hard plastic... and if it is still not working replace the CRT socket....
I got an RCA 27" TV from someone who had moved it to another room but
found it was "blurry" after moving it. I brought it home and tried all
the suggestions I had found online but it was still blurry. I looked
at the back of the TV and found 2 tiny knobs on the right (from the
back view) which I began to fiddle with while looking at the screen.
It fixed the blurriness immediately! I now have a beautiful screen.
What are you looking at on the screen?
Before or after the shot?
The this point the taking sequence-point camera at scene look in screen blurry image - half press the release - autofocus comes into play- press all the way picture takes.Sharp picture in the taken images
what are you doing?
Sounds like theres a leaky capacitor in the screen drive circuit. I have seen this problem also be a gassy crt but was able to clean off the grids of the CRT with a crt/rejuvinator. It happens because of low emmissions in the tube and when white is on thats a mix of all the colors, so the tube works harder. I bet when you whatch a movie and the scene changes suddenly to a white or brite scene the pic looks a little washed out. If this is not the case then I aggree with the Pravin and try it on another TV just to be sure .. This is not a repair for a consumer to do, though however it is only a three year old set you stated, so there should be life left in the tube, so im kinda thinking a capacitor is bad. Seek out a yechnician to check this out for you as a TV is not a place to see it you can fix it or to exoeeriment with. Good Luck