WOW, that is a powerful demag you have, erased the BD from 15ft-20ft?
Just kidding, pulling your chain.
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
No, magnets do not affect any of these mediums, CD, DVD/BD, etc.
I have no idea why it is not playing especially since you tried 3 players now.
Another experiment is to take it to a Blockbuster if you have one near you and see if they would also try to play it, or, at an audio store if there is one near you.