Optoma hd65 wont power on

The problem sounds like the lamp ballast is bad--it's a circuit that initially starts the lamp and then keeps it burning--the lamps are like a welder's arc inside of a glass globe. When you push the power button, the ballast uses a spark of electricity (sort of like a spark plug) to get the initial arc going and then switches to low voltage, but HIGH amps to keep it going.---Rick