Samsung HL67A750A1F Support Question
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Question posted by citybrian on November 3rd, 2012
A Problem With My Tv
I understand this TV has a lot of problems on start up, specifically no picture or sound and all three LED lights flash. What is the problem?
Current Answers
Answer #1: Posted by TVDan on November 3rd, 2012 7:31 PM
this blink code is because the lamp didn't light up, usually replacing the lamp will fix the problem
Normally this is an indication that you have a bad lamp, but really what this indication is, the microprocessor has not received the signal from the optical engine that "the lamp is lit and all is well". There are many things that need to happen before the lamp will start up. The power supply must develop all the needed voltages required by all the rest of the circuits, the cooling fans must be running at the correct speeds, the lamp door switch must be closed (interlock switch), The Color Wheel must be able to spin at the 1800 RPM and lock in sync with the video signal, the ballast circuit must be able to develop the 5000 volts to start-up the mercury vapor lamp, and the lamp needs to be in good working condition to light up. There should be no weird noises pointing to the fact that a fan or the color wheels motor bearings are starting to go bad.
TV Dan
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