I think I understand what you mean. That's strange. I don't think there's anything you can do about that other than having Samsung look at it. Hopefully it will go away or something and you'll save a few bucks. If he hasn't had it long, Samsung should fix it for him without him having to pay for anything, unless they find that your brother caused it to happen. Just call them and ask about it.
Samsung customer support - 1.800.726.7864