Sony WEGA KV-34HS510 Discoloration

[TNGAL]

I have some discoloration in this set at the Upper Top Right and Lower Bottom Left of the Screen.

Is this a terrible problem? What can I do? Will it get worse? How much to repair?

Any information, advise will be appreciated. THANKS!

[StarBaseONE2]

Have you attempted a degaussing of the screen? If this helps trace down and check the the thermister near where the main A.C. hits the board. Maybe this will help.
_________________
...Somewhere on the fringes of the Cosmic Coast, and still only allowed a small bunk in the enlisted quarters!
StarBaseONE2

[Greg]

[Guest]

Just a quick note before manually degausing or opening the set.
We used to get many phone calls if the set was moved or after a storm with these symptoms.
First ensure no magnets next to the t.v like hi-fi speakers and then switch off the set from the main mains on/off switch (not using the remote) or unplug from mains and leave for a couple of hours to cool and when you switch on again it should be o.k if not you may have to do it manually but I would assume the posistor is faulty as StarBaseONE2 suggests.

[Guest]

I've heard peole have used an electric drill to manually degause although I personally have never tried it but it may work as it produces a symetrical a.c waveform from the motor windings.
Anybody else tried it?

[Guest]

I own the exact same TV and it has the discoloration on the bottom left corner. It's a bright green blotch in the lower left corner.