CCFL UV lighting not going

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crooked windows

crooked windows

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Jul 4, 2013
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the two Sunbeam Tech CC-FL UV tubes powered by one double output inverter lighting up the insides of my PC is not working. They worked for a short time but then wouldn't turn on. I have power going to the inverter but wish to know the procedure to test out put. knowing this is a high voltage (600+ volts) is there a quick check to see if its the inverter or tubes before I replace them?
 
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immortalpenguin9

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Nov 27, 2012
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Have you tried just one tube at a time first to see if it can even light one? Also make sure the molex connector is nice and snug. I know the 2 I bought had really crappy connectors and a pin would slide out a little and lose contact.
 
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Cristi72

Cristi72

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Jun 25, 2014
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Hello,

It's highly unlikely both tubes got broken at the same time. Power the inverter from an external 12V supply and use only one tube at the time; if none of the tubes is lighting up, the inverter is gone.

No matter what, don't let the inverter without load.
 
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Cristi72

Cristi72

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Jun 25, 2014
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The usual suspects are the high-voltage capacitors, followed by the power transistors and the controller. If the inverter is a low-end one, the output transformer can also fail.
 
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