My Tv Model #P61937 is beeping from the back of tv

So out of the blue, my tv started making a medium beeping sound, from the back of the tv. My tv will now NOT turn back on. What happened?? What do I do?? I dont want to be out of a tv! I have searched the RCA website and found nothing in FAQ or technical support. The tv means alot to me and would like to keep it going.