the only thing that still has power on it when you turn off the radio is the WX board. have seen them in cobra 29 radios do some stuff like your is doing. just think about it. when the radio turns off at the switch the wx board is all that is left with power on it. the alert is not powered with the switch. so what else could it be. as others said you have a ghost in the radio. check and make sure your switch turns off all the way. never saw one that stays partially on. if so the main radio would be on.
Thanks Sonoma. That sure makes sense, if the WX is still powered even after the switch is off. This has happened about 4 times. The radio is off, then out of no where it comes on with a loud squeal, meter light also on and I have to unplug the back power cable to depower it. I'll try to research it and disconnect the power lead wire to the WX. Thanks again.