Question about Samsung HLN5065W 50" Rear Projection HDTV-Ready Television

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Replacing ballast how do you find bad ballast?

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Hello,

You would need to test the voltage coming to the ballast which depending on the ballast should be at least 320V but nothing higher than 370V maybe even 380V? (if someone know the exact please post)
CAUTION DO NOT TEST THE POWER GOING FROM BALLAST TO THE LAMP ITSELF (the ignition charge is too much ~15kV)

I assume you tried a new original Philips lamp and that you replaced the lamp door cover correctly.

Posted on Jan 16, 2014

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DLP Lamp has electrodes inside and ballast generates high voltage that makes spark on these electrodes thus got high bright light. New lamp wont die due to bad ballast so replace lamp and see tv works or not.
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To confirm if the ballast is bad check the ballast board to see if the spark gap (on the ballast board) lights when you first turn the set on. If it does than the ballast is ok.

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I believe it is a Back Light failure. Either because of a bad Ballast, a Power Supply, or a bad Lamp that is not replaceable. If it is a bad Ballast or Power Supply they are replaceable. Checking the Voltage from the Power Supply for the Ballast will tell if the Power Supply is bad. It should read around 250V to 300V.
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1 Answer

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Power issues (Tv True True (``````````` (``````````` 0 95250 95250 clip_image002.gif not turning on) were typically due to faulty ballast. While the TV reports a bad lamp it is the ballast itself causing the issue. Samsung True True (``````````` (``````````` 0 95250 95250 clip_image002.gif is well aware and will replace both the ballast and the lamp (since the lamp can be prematurely aged but the bad ballast). After replacment most people stop having issues.

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Power issues (Tv True True (``````````` (``````````` 0 95250 95250 clip_image002.gif not turning on) were typically due to faulty ballast. While the TV reports a bad lamp it is the ballast itself causing the issue. Samsung True True (``````````` (``````````` 0 95250 95250 clip_image002.gif is well aware and will replace both the ballast and the lamp (since the lamp can be prematurely aged but the bad ballast). After replacment most people stop having issues.

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