this may be a dumb question, but what could be wrong other than the speakers being bad. i have logitech speakers that has a wired remote to it. i had my speakers turned on about 30 min. ago and they were working fine. then i turn the speakers off with the remote, it has a blue led showing they are on. well a little bit ago i go to turn them on......nothing....like there is no power to them. blue led wont come on or anything. what could it be?