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Replace lamp and lamp light continues to blink and will not come on. lamp is good but will not power up. fan is on so there is power. any suggestions?

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Usually if the lamp light starts blinking and it will not fire up after the lamp is installed then that means that you still have the lamp door of and the toggle switch that detects the lamp door being off is activated and so the tv is in failsafe mode and is not turning on to protect you. If you know that you have the lamp door back on and the switch is pushed back into place as it is supposed to be then the issue is most likely your ballast. The ballast can appear to be the same symptoms as the lamp. If the lamp itself was not damaged or broken then its possible the lamp was fine all along and the ballast is bad. The ballast is the board the connects to the lamp and charges up the high voltage to fire up the lamp. If it is damaged in some way then the lamp will not fire. Just as a precaution you can test the wire connected into the ballast from the power supply board and make sure you are getting voltage. If you are getting voltage and the lamp is good and the lamp door toggle switch is not activated or the lamp temp board wire is not unplugged then you definitely have a ballast problem. Those are the only components that can cause the lamp to fire. The lamp temp board is a little board on top of the lamp housing that just has 1 small wire connected to it that is a thermometer. If that is unplugged the lamp will also not fire. So, requirements for fire lamp:
1. Power from power supply board to ballast
2. Ballast converting power out to lamp
3. Lamp door switch must be suppressed
4. Lamp temp board must be plugged in and functioning.

Posted on Jun 26, 2009

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