Sony KV32S42 with spot in upper left corner

[zeno]

Originally Posted by old_tv_nut

I don't know for sure, but some large color CRTs used purity trimming magnets glued to the back of the tube. If that's the case here, one may have fallen off.

Anyone here with more direct familiarity with this set?

Ditto
Sonys usually have little discs or discs glued to plastic sticks then
taped to the bell. They do fall off. You should have a pure blank
raster & a R, G or B color only. Put them in place & move around to
find the sweet spot.
If it comes back or cant be cured its usually the shadow mask broke
loose. Very common when the set gets dropped.
BTW when you junk a set save a few magnets.

73 Zeno