Gary bought a computer from GoodWill that they have put together. Leo says that's a great idea, and he got a great price on it too. But he's noticed that the fan is making noise. Leo says that could be a wire that has gotten in the way, and that could be dangerous. It could short circuit the wire and cause a fire. So Gary should open up the computer and make sure there's nothing hitting the fan. If that's not the issue, then the bearing of the fan may need to "warm up." They can easily be replaced.