9154 Views 7 Replies Latest reply: Apr 7, 2010 10:54 AM by JP215
Curious, as you say if the backlighting had failed then it would be black not dim, and the inverted colours sound more like a cable fault ... I'd be tempted to take a peek inside and see if you can find anything loose or obviously shorting/mis-connected.
Did you try doing a Parameter RAM reset - hold down command/option/p/r keys at start up and wait for three chimes before releasing the keys?
Thanks for the response!
I tried resetting the PRAM like you listed but that had no effect. I bought a new LCD inverter for my macbook pro to see if that could possibly fix the brightness problem, but the problem still persisted.
The previous owner had mentioned something of a overheating problem. I noticed nothing melted/browned on the logic board and all the cables seemed to be fine. I reseated all the connections to the LCD screen and the computer still booted with the same problems. I have not noticed any excessive heat problems with the computer since I have had it.
Also note, when the computer begins to boot and displays a white screen with an apple, it is just as dim as when the computer is running. Leading me to believe it is a hardware problem(I have also reinstalled the OS recently).
Tilting the screen to different angles and putting pressure on different parts of the back of the LCD does not make any differences either.
Thanks again for the input.
I'd be wondering whether it is simply the fluorescent backlight (replaced by LED backlights in later models) deteriorating, babyed.
This certainly used to be an issue on PowerBooks and Ibooks in the past - see HERE for example.
I'm afraid I haven't come across any instructions for simply replacing the backlight, rather than the entire screen, on the early MBP models, though, and it doesn't provide an obvious explanation of the inverted colours. Mmm.
The inverter cable is another component worth considering, I guess.
Does the computer have a "clean" OS installation on it, appropriate to the model? Is it the same when booted from an OS DVD? Is it equally dark when booted in target Disk Mode?
Tried running the Apple Hardware test?
Same kind of issue here. My 17" macbook pro display suddenly went dark, very dark. Using a flashlight I was able to navigate a little but ended up hooking up an external monitor (which works fine).
1. Did PRAM and SMC reset, no change.
2. I tried replacing the inverter board, no luck.
3. I thought It might be the backlight form the display itself, so replaced the LCD screen. Still the SAME !
43. I just ordered another inverted board, just because I have a feeling the first one might of been bad, and also ordered the LCD display cable and the isight/inverter cable...
Current conclusion: if after changing all of those parts, the screen is still dark, it's the logic board
Will keep you posted when I get the new parts
Hey I am having the same problem.
With a friend who happen to find a black macbook.
The screen is very dim and I can see it slightly.
I tried to detect monitor and went to the display settings everything was ok.
I am going to be opening it to try and tinker. If anything works I will repost.
But after reading everything in the forum I doubt I'll be successful.
The black macbook is having problems not always starting which is a completely probably worse problem. But I am just curious to try and at least figure out why it's doing this.
It does look like it has taken a drop.