I have a Havit HV-F2060 cooling pad with six small and (normally) very quiet cooling fans. Lately whenever I first turn it on, one of the fans begins making an obnoxious buzzing sound like the cooling pad is full of angry bees or something.
Taking it apart for cleaning does nothing to resolve the issue. Smacking it out of frustration seems to make it stop, but I don't want to end up breaking something. What could be the cause of this sound and how might I be able to fix it?