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yellow steady light is overheating. you have a stuck fan or its all clogged with dust. The only way to fix it is to find what is causing it to overheat or prevent the fan from spinning. It is not lamp related unless you bought a lamp that does not have an Osram bulb inside.
hi,
Check the lamp cooling fan. If the fan is faulty then the lamp will become overheated and the protection circuit will turn it off . you can see the fan near the lamp housing.
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Did you press the System Reset button with a ball point pin on the front of the set? You might have a ballast going bad if it has never been replaced. But first, the reset button then you may have a thermal switch which is located just above the lamp housing. I test the thermal switches by unhooking (while set is unplugged) one of the wires and then putting an alligator clip jumper between the two wires to see if it last longer than the 30 minutes you mentioned. Lastly, there must not be any dust in and around the fan which can cause overheating. Sounds like you have an overheating problem initially. The thermal switch cuts the set off if there is overheating. And also if the switch is faulty it will cut off the set. Also look in the menu for a temperature setting if this model has a setting such as this.
The uProcessor thinks that it has overheated and is frantically trying to cool down what it thinks is a hot lamp. This condition has many causes from an exhausted lamp to lamp ballast fault or even a power supply fault or a heat sensor/fan fault.
Four blinks is a fan error, I don't think that set has a filter but may have more than one fan. If the fan blades have a lot of dust on them that can cause slow rotation, can just be a bad fan or improper voltage going to the fan.
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