My DELL LATITUDE D620 display backlight go off. If I close the laptop (then it goes in his suspend mode , and make the action to turn-off the display) , and open it (then the laptop go out of his suspend mode and make the action tu turn-on the display) , the backligth turns on. The question is : the problem is the backligth tube or the inverter?
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Hmm, not sure. I doubt it's the tube if it can turn on and off. I would say the inverter.