[G4] Speakers Interfering with Monitors

[Ron Michaels]

I just installed some new Logitech Z-2300 speakers. The sound is great 
and I love them. The woofer is between my two 19-inch NEC monitors. 
Suddenly my monitors have "screwed up" color. There's nothing in the 
manual about this. Has this ever happened to you and if so, what do you 
do about it. I can't imagine what would cause this interference from an 
electrical standpoint, but I'm a relative novice. I have a G4, mirror 
door, 1.25mhz with OS 10.3.9.
Thanks for any help.
Ron/Memphis