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this is hard to tell with the information you have given us it could be that the power supply is not sending the right amount of voltage to turn your tv set on 2: it could the ballast board that it is not sending the right or enough amount of voltage to the lamp to turn it on 3: It could be the lamp it most likely burned depending on how old your lamp is this lamps are good for 6000 life hours
if you give us more information that would be more helpful
I wouldn't trust anything this repairman said reason well for one thing how could he (or anyone) tell everything else is "in perfect condition" when he couldn't "see" anything to tell what it looked like. He might be right about the power supply being bad But it could also be the high voltage "power supply" could have a short and that would cause the symptions you describe But if you want to try the power supply your self you can call Pioneer and give them the model number and they should be able to get the information you need. tvkirk
Its either the power supply or the LSB. You can get free info at the following link which will help you determine which part you need. Just leave them a email with your model number and symptom. http://servicemanuals.vstore.ca/
First disconnect power and remove rear cover look to see if any dust has settled on tubes. I think on that model you can remove screen frame by removing speaker grill, remove a few screws and then pullin forward on screen frame. Then screen w/ brackets will slide forward exposing tubes and mirror. This will allow you to look down in tubes with power on and see if any debris has grown in coolant chamber. This will tell you if you need coolant replaced, or if you need adjustments and/or circuit board work. Do not try to do adjustments if tubes are cloudy. Just have coolant replaced and the set will look like new. Good luck, Russmann.
It seems your "power regulator" a small unit inside tv device has damaged due to wrong power supply. In this case usually the power capacitor burns and few other electronic components like triodes. Get the help of a electronic chip technician to replace the damaged components.
A chirping sound usually means that one of the secondary supplies has shorted, most likely the horizontal output transistor. The power supply "chirps", which is the sound it makes when it protects itself from drawing too much current. The set should be serviced by someone with experience in Philips projection TV'.