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My daughters laptop LCD went dark a while back, in a dark room you can see that the screen wants to work but will not. I am familiar with laptop repair, have replaced MANY screens. It seems I have been lucky to have the same fix work each time.

I did my usual routine for diagnosis by plugging in an exterior monitor, which worked. So, bad LCD, I figured. Ordered a new LCD, got it, installed it and no video, or should I say the same issue with the original screen. So I ordered an inverter for the laptop, exact type, tried it, no good, same issue. I returned the LCD screen for an exchange, got another one, tried that, still the same issue. I know about the connector issues, and I have been now even more watchful how they go, since I did a second teardown and reconnect on one, a Toshiba, I worked on a few months ago, just to find out it worked after reassembly.

So, bottom line question is, since the only obvious thing left to change is the video cable for this Toshiba laptop, could there be anything else that would cause the same symptom I describe? What throws me on this is the screen works, just not backlit. So if the cable is bad, then just that wire that the inverter is on must be damaged.... just guessing.

Secondly, how likely it is that video cables are at fault? Seriously, I must have changed at least a dozen or two dozen LCD screens over the years, (its a hobby for me) so for me it does not seem very probable at all. I have seen in this site that there have been others with the same problem, bad cable, but there is not way to tell based on that. The most reliable way to know would be of somebody else's experiences, since this is my first go at it.

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Did any of the replacement LCD panels come with a new CCFL backlight? I'm no laptop expert but AFAIK there are three independent components that need to be tested and repaired or replaced: The LCD panel, the inverter and the CCFL backlight. –  joeqwerty Jan 30 at 21:45
    
I ordered a new inverter, tried that, as mentioned above. The backlight is part of the LCD screen itself, at least all the ones I ordered. I understand they can be replaced separately, though really a tedious task, since the CCFL's are really delicate. Thanks for the response. –  Jack Jan 30 at 22:57

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