cable hum after thunderstorm.........


Hi all,
Had Thunderstorms roll through early today and now I cant get the hum to go away from my cable, if I pull the feed from the wall it goes away, is this a box issue or something outside?, I rebooted the box several times with no help, could a ground breaker for the cable from Radio Shack be the answer (this has happened before but went away., thanks
chadnliz