Are you saying
that "phosphor screen burn" on a CRT can be fixed by a
strong exposure to sunlight?
That sounds too bizarre - I would expect that strong
exposure to the sun
would simply fade the phosphors even more...
sure, . . .
just burn the rest of the screen to match, or until the percentage of
difference is less noticeable
Go to reverse video, and leave a Visicalc L-bar on for a long time.