Why should you not put a magnet near a tv or computer?

the magnet will get demagnetised if you keep magnet near the computers and t.v 

Computer use magnetic fields to store the information. Storing a magnet next to them will erase them. Note that magnetized scissors, and that little magnet at the top of a paper clip holder will ALSO erase them.

Television, ESPECIALLY color television, uses magnetic fields to control the picture. Storing a magnet next to a television can cause the picture to look bad -- but the damage is usually not permanent. 

all the magnets