Also the screen can make lots of EMI. Probably the backlight. One customer had a laptop that radiated enourmously from the back of the screen, enought to make his picologic data logger measure horribly wrong. (Teeese Picologic are toys, BTW :( ) /Morgan -- Morgan Olsson, Kivik, Sweden -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist