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The notebook works perfectly fine when hooked to an external monitor, but the internal monitor has the following symptom.
As shown in this video, the screen is dark. Except that when I turn the brightness down to zero, the screen lights up for the first few brightness steps.
Does this look like the inverter is faulty? Am I at least able to rule out that the LCD (including backlight) needs to be replaced?
Is this a good question?
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That is not a common inverter issue. Move the screen back and forth and see if the issue persists. Try hooking up to an external monitor and let us know your results. Thanks
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Moving the screen from near closed to fully open does not trigger even a tiny flash of brightness. But the image on the external display is perfectly fine.
Your hunch was right. It's over a month later. I have now tested the inverter cable with a meter (gently wiggling the cable during the process to avoid false readings). The cable seems fine. I went ahead and ordered then replaced the inverter board. The exact same problem persists. What else would you try?
If you can discern the desktop, then the issue is usually inverter related. A totally black desktop usually involves the display data cable. I would first try reaseating the logic board attachment, next the LCD attachment, next replace the cable, here's how to do it: MacBook Core 2 Duo Display Data Cable Replacement
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Hi I've got the same problem, my macbook has had it for a while. Same thing with changing the brightness making it go on. From what I've read this is not the common inverter problem that people often have and neither is it the inverter cable because moving the screen makes no difference.
When I do get my screen to light up for a bit, I can often see a red/pink hue to it. This sometimes goes away after a while of the screen being on. But apparently the red colour of the screen means that there is a problem with the CCFL backlight bulb:
"Defective CCFL backlight may have the following symptoms: Screen flashes on red/pink and goes off. Picture stays on in red and slowly be come normal. Picture flickering with dim display. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of its life."
So in my case I know 100% that the backlight is faulty so I've bought another LCD display off eBay and hopefully this will solve the problem.
I can't see a red colour on your screen in the video, but it still is possible that the backlight is faulty, so don't rule it out.
Hope this has helped a bit.
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It would be really, really nice to hear you confirm that it is the CCFL. I understand that one can go the simple route and replace the entire LCD, but the extra work needed to solder the CCFL should not be that hard.
If you have had good experience with a supplier, please also mention who it is. Off ebay I've received a component advertised as brand new but it was obviously salvaged from an old macbook.
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i have the same problem. the backlight will only work if the seeting is turned all the way down and turned back up one click. i have replaced both the inverter and the cable yet there has been no changee in performance. the problem has gotten worse and worse i used to be able to use the computer in the owest brightness for an extended period of time, but now it will not stay lit for more than a split second. still have not found any solution
by patrick hensley