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The backlight on my wife's MacBook Core 2 Duo was burned out - the computer turned on and worked well when plugged in to an external display, but the built-in display did not turn on. Actually, it did - as you could see the image on screen from a certain angle, but the backlight was not working. I had previous ordered the inverter board and cable, thinking that they were the problem, but after replacing them, the issue still remained. It was at that point that I returned those parts and ordered the LCD instead.
The repair went pretty well - I had already done quite a bit of work on the inverter board replacement, so the second time around I was able to do things much more quickly. The two biggest hassles for me were dealing with all of the tiny plastic clips getting stuck to the display bezel, and getting the clutch cover back in place properly. The display worked great once everything was put back together. However, I apparently damaged the fan while I was working, as the fan now does not turn on. So that's another repair I'm in for... :-)
Here is my gallery of photos from my repair:
Use a daily pill organizer to keep track of your screws. They have individual segments that are perfectly sized to keep track of screws, as well as closing/locking lids for each segment.
Make sure you're using the proper sized screwdrivers. The most useful one for me was a minuscule eyeglass-sized screwdriver. It was smaller than the phillips 000 screwdriver and worked wonders with many of the small internal screws, especially the ones holding the top case and display bezel on.
Also, everyone mentions this, but it can't be overemphasized, be really careful with the tiny plastic clips around the display bezel. They break really easily and can come flying off and skitter into a far corner of the room if you're not careful.