Model A1286. Released February 2011 / 2.0, 2.2, or 2.3 GHz Quad-core Intel Core i7 Processor

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no display and keyboard backlight

Hi

I got a MacBook Pro A1286. But the backlight not works on the screen on the keyboard or on the apple logo back. What is broken ? And the screen works, everything works except the backlight. And the apple logo on the back not works also.

What is broken ,

thank you and have a good day

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Most Helpful Answer

Goowie, that is somewhat odd. The circuitry for both backlights are separate. I'd try a complete reset (SMC PRAM). Make sure that the ribbon cable for the keyboard backlight is properly connected. As for your display backlight, it could be the backlight fuse as well as the backlight driver and lots of other components in between. You will have to disassemble your computer and take a look at all the connections and components. You should also check the history of the computer to ensure that there was no water damage etc. prior to you getting it. Let us know how you determined that the display works. Also, connect an external monitor and see if that works without any issues.

Update

the backlight fuse is reference designator F9700 and it is a 3Amp 32V SMD fuse in a 0603 package. The backlight driver is reference designator U9701 and it is a LP8550 IC. Datasheet available right here.

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Hi oldturkey03

I know that the backlight does not work since the mac took lightning when it was plugged in.

I try a complet reset but nothing has changed. the screen works! I can see the display and colors when I put the flashlight on the screen. And it works with an external display. My logicboard is 820-2915-B

can you help me identify the fuse or backlight chip?

https://onedrive.live.com/redir?resi...n...

https://onedrive.live.com/redir?resi...n...

https://onedrive.live.com/redir?resi...n...

Thank you ans have a good day !

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Goowie, tell us more about this "took lightning when it was plugged in." Also, got some trouble accessing your images "This item might have been deleted, expired, or you might not have permission to view it. Contact the owner of this item for more information."

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Hello. thank you very much for your response. my MacBook Pro was connected with the MagSafe 85w when a lightning hit my house. after, there was no backlight. How can I test the fuse or the driver? with a multimeter? thank you very much and have a good day

This is the link of my logicboard :

http://www.noelshack.com/2014-48-1416809...

http://www.noelshack.com/2014-48-1416809...

http://www.noelshack.com/2014-48-1416809...

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