Question about Apple PowerBook G4 Mac Notebook
The problem is fairly common and while you could test the long-shot possibility that it's not the inverter but the actual CCFL "bulb" (a tube really) that produces the light and sits in the bottom of the LCD panel, the chances are that it's a circuitry problem on the logic board. I've never had luck replacing inverters in these computers (though it works like a charm in PCs).
With the symptoms you have though, it might make sense to try the $20 inverter rather than replace the logic board. It's really quite simple. Just follow the instructions on THIS PAGE and select Apple MacBook Pro (even though you have a PowerBook it's almost exactly the same.)
It will walk you through taking the back off and pulling the LCD, but just notice that on Diagram #2 it shows you where the inverter board is. Just take it out, remove the two cables going to it and replace it with a known good one from eBay. It will be a great $20 way to check a cheap solution. After that fails, replace the logic board.
Or, for more fun, find another person with another laptop who doesn't mind you pulling it apart. Almost all 12" laptops will use a similar CCFL, so you can plug your LCD panel into just the two prong CCFL plug (shown in step 3 of the walk through). If you find someone else with a powerbook or iBook I know for certain that your screen's CCFL plug will fit.
So you could do all this or you could find someone on Craigslist to do it for you for a pretty cheap cost. Good Luck.
to peachgroup: if you have a lighted White screen, it is something completely different.
Posted on Oct 14, 2008
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Posted on Jan 02, 2017
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