Have a 4 yr old 32" samsung flat screen. The screen recently has an approximately 1/4 inch wide line going horizontally across the entire screen and more recently a second line of approximately 1/3 of an inch doing the same thing. Is this something that can be easily repaired or do I throw the TV away.

It can be costly and difficult to replace the internals of any flatscreen television screen. Your best bet is to consult an electronics professional in your area for an estimate in repairs.
If you are a technically inclined person and you've got nothing to lose, you could always try ordering a new board online and attempting an install on your own.
Take a look at NewEgg, they usually have a good deal now and again on electronics parts, televisions included.

http://www.newegg.com/