Originally Posted by mapson
one word...magnets. I corrected most of it on my 955, do a search for my thread on horizontal distortion. For the fearless and it may still not remove completely but you will see an improvement if you decide to (*gulp*) stick your hand back there. It isn't easy as there is a lot of trail and error so if you're not a patient person, it may not be in your best interest to try it.
I think you are right about everything, and I haven't tried it myself yet. I had a service guy come out for a vertical convergence problem (horizontal lines), and he fixed that in a jiffy with the rotating magnets on the neck of the tube. When I asked him about the curvature in the corners and a slight bluish patch left of center, he reminded me of something I already believed: that you can get very screwed around with magnets. You adjust convergence/curvature in one place, and it goes out somewhere else. Deflection of the beam to straighten out those corners may conflict with vertical convergence for the same area, and so you may get the geometry right but have more color fringing on horizontal white lines. I say "may" because I don't have personal experience yet. (I do with computer monitors.)
I know there is a cluster of stick-on magnets on my tube just behind where the bluish patch is. Is it the cause or an attempt at a fix, I don't know? I'm motivated to find out. For now I'm ignoring it.
The service tech, in response to my request, didn't hesitate to give me a couple of "official" magnet assemblies. Each is a plastic base with self-stick tape, plus two independent magnets that can be (a) rotated to cancel or reinforce each other in strength, and (b) together rotated in any orientation. Haven't used them yet.
You might consider that *two* similar magnets stuck together might help you lessen the affect of a too-strong single magnet. Further, you have to consider whether the magnet's poles should be perpendicular to the tube, parallel to it, or somewhere in-between.
You can purchase at an Office-Depot-type store a flexible, rubbery, clay-like adhesive that you can mold into any shape. (Usually blue or white, maybe called "artists adhesive" or "type cleaner." Not a wax!) It doesn't deteriorate significantly with age and is great for adhering magnets to CRTs or nearby plastic in almost any position. Double-stick foam, by comparison, really limits your positioning ability and is hard to reposition without destruction.