A:AnswerI have not seen that on my TV. Check if that is happening with certain audio sources like apps, consoles, blue-rays, etc. If this is happening with everything, I would reset it and try again. Use your warranty. They can help you with troubleshooting steps.
A:AnswerNo, it's the same premise as buying car insurance. Even if you don't use it, you want it in case anything happens. You don't get your money back if you don't use it.
A:AnswerIf it is broken, bring it to your Local Best Buy (as long as it's not from physical damage). Otherwise, you must purchase one through Best Buy or another authorized dealer.
A:AnswerAs long as the screen did not suffer physical damage by you, it is covered. Protection plans do not cover physical damage caused by the owner or their children/animals/friends etc.