Rear Projection TV Problem?

I have the Sony 51" rear-projection TV KP-51WS520 and it started to have trouble turning on. It would work sometimes, but then stop working recently. When you try to turn it on it blinks 9 times, pause. I don't know if it is a failed bulb or problem with the circuit board. I looked around the Internet and I saw those two possibilities. I had the TV for about 6 years or so.