Released October 2008 / 2.4, 2.53, 2.66, 2.8 or 2.93 GHz Core 2 Duo Processor

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LCD Backlight no longer works?

I bought a used A1286 Macbook Pro that had a few small problems unrelated to the display. I fixed these and used the computer for a few days. I later opened it back up because I had not aligned the headphone jack properly. Upon putting the computer back together, my backlight no longer works.

I have tried resetting the pram, smc, and checking every possible cable. What gives?

Thanks.

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Will did you ever find the solution to your problem?

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Incorrect BinaryHaze, A1286 MacBooks run an LED backlight configuration without an Inverter. Sounds more like a connection LVDS problem or a shorted backlight.

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Correct D3X, there is no inverter. I feel like the LVDS cable is still good as well as the connection but I have been told it is unusual for the backlights to short. I don't mind replacing the display but I can confirm the computer works fine otherwise. I have it hooked up using displayport and it works well except for no backlight.

Is there a chip anywhere on the logic board that controls the backlight that could be shorted out?

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+ If it runs on an external monitor the logic board is fine. With it going out when it did you cables and connections are where to look.

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That is good news. The LVDS cable and connector on the logic board appears OK.

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Make sure to check all connections. Specifically you should see a small board about 1.5"x2"(? in PCs a .5"x6" board is typical) with some mention of "High Voltage". This is the inverter for the CCFL (Cold Cathode Florescent Lamp). Sounds like it isn't plugged in.

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