I have a Dell Inspiron 15 series laptop (model 3521), purchased very recently. A few days back, the laptop was a little roughly handled as i was trying to put it in a tray for check-in. Since then, whenever i switch it on, the laptop gives one beep, only one, before it starts up normally. However, this single beep was never heard before and i am worried as this is a brand new laptop. Should i be worried?