Hi all, Do the WRT54G v4 routers make a small high pitched noise while powered on or should they be absolutely quiet? Mine seems to make a high pitched ring that I can hear only when the unit is 3 inches from my ear. I am concerneed that the unit is defective although the wireless works as expected. Firmware is Linksys v4.20.7. Thanks. PS: For those of you who noticed, I posted the same question at WRT54G.net.