So Wev had this TV for 6 years now and it was passed down to me, and it has been hooked up in the room its in, that was its original room, and i plugged it in and hooked the cable up to it, and it works, but i cant get a signal, its just a blue screen, all of the buttons work, and i dont know how to access the menu. I was just wondering, is there something i didnt do? whats going on? also i have a universal remote not the original.