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Model A1502 / 2.6 GHz (Turbo Boost up to 3.1 GHz) or 2.8 GHz (Turbo Boost up to 3.3 GHz) dual-core Intel Core i7 processor with 4MB shared L3 cache.

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Where is located the screen backlight fuse?

After a liquid spill, I've cleaned the motherboard and connexions. Everything worked fine for some time but the screen started to blink and went dark a few times until it got dark permanently.

Anyone can point me where the screen backlight fuse is located in the 13" retina mid 2014 model?

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Roy Lopez, that would be F7700 which is a 3 A 32 V fuse in a 0603 package. This "screen started to blink and went dark a few times until it got dark permanently." does not sound like the fuse. You do want to check a bit more. Of course, check the fuse first.

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Pin 1 of LCD connector is probably &&^&@@.

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Roy Lopez 将永远感激不已
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