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I am trying to figure out what is wrong with this mid-2010 MacBook Unibody I have just bought off of a guy because he thought it was broken (because the back light was out). If I shine a light through the back the laptop (where the apple is) or on the screen i can see things such as the background, mouse movement, etc. But THERE IS NO BACKLIGHT. I’ve looked all over google and youtube for “how to” videos but I’m getting no luck because people are working using/working on the aluminum body MacBook Pro in everything I find. I don’t know if I should replace the wire connecting to the display, replace the LCD or if i should go straight for the fuse. (if it is the fuse can someone link the guide) I’d appreciate if you could help Thanks in advance MontelSC
More often than not the backlight fuse needs replacing. Here’s the location marked in Green it’s the one with a white dot or the letter P:
Use a volt meter to check it.
Grab a schematic and board view (will be 820-2877 or 820-2883, check your board for the number). Check the schematic for the section on the backlight, and measure the voltage on both sides. If one side is missing voltage, remove the backlight fuse and check for a short to ground. If no short to ground, replace the fuse. Could be something else, you need to check the schematic and measure voltages to find out what is wrong. I have never had to replace a screen due to bad backlight (unless there was liquid damage on the screen), check the cable to see if it looks good. Also check the LCD connector for burnt pins. There is no sure way to know what the problem is, you will have to diagnose it yourself to find out.
