Why won't lamp turn on after being replaced along with ballast?

LED lights indicated that I had a lamp problem. Lamp wouldn't fire when the set is turned on. Replaced bulb (Phillips), still same problem. Replaced the ballast (new from Samsung), same condition. Had both the old and new bulbs tested and they both worked. I have correct the voltage to the ballast and I hear it clicking trying to fire the lamp. I have visually check all the capacitors and do not see any with rounded tops. I have also checked the color wheel, it is turning with a faint whirring noise. Could the bulb temperature sensor cause this failure?