As far as I know its any TV, they all need to do it at somestage.

Its to do with getting that electron beam to the phosphor[?] grid in a straight line. 

I once placed some unshielded speakers too close to a TV with very and I say very strange effects on the picture. This was cured by repeated degaussing of the type previously discussed.

Quote

"but we're talking about demagnetising the ink."

Are we ? you maybe !

Are we certain there is no ferrus content, or contamination of the material in a CD ?

Seems unlikely, though the polycarbonate [C16 H14 O3] Aluminium, lacquer [polyeurathane?]

and ink may be contaminated.

If this phenomena does occur the ink may be the

culperate, I can find an anlysis on the web.