Nick,It does sound like a power board issue. Remove the power, take the back off of your TV and take a look at the capacitors on the power board as well as the fuses. Follow this guide for the fuses. Look for any bulging tops on the caps as well as any leakage. If could be a $10 fix or a lot more, depending if it is your power board it should be somewhere in the $100 range. I would at least take a good look at it and see what it needs before writing it off. Those are pretty good TV's...:-) Hope this helps, good luck.