turns on first time and stays on for a few minutes then shuts off. when turned back on it will shut off much quicker . what is causing this? something is heating up and/or resistance is changing somewhere.easy fix/or not?

sam i am, July 2012

It seems capacitor problems. It may require capacitor replacement.
If you cannot fix it Call customer service in your TV book that came with the TV. They will find you a repair shop near you to get the part you need to replace.
I can suggest you this repair service www.tvrepairjacksonville.com

andrew, July 2012