The LCD bands could be caused by the cable that connects the motherboard to the monitor via the swivel mechanism coming loose. It can be investigated if you are that way inclined but it is a very fiddly task and some practice on the craftiness employed on how they assemble these things would come in handy, otherwise you could be snapping plastic bits.
Repair is probably not worth it as second hand laptops are very cheap. There are a number of second hand computer shops around that should be able to sell you a more modern one with a warranty.