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MacBook PRO 13 Mid 2012 MBP 820-3115-B No Backlight  

 

Obahan Aygun
iExpert Australia
(@gadgetfix)
Eminent Tech Registered
Joined:7 months  ago
Posts: 34
20/12/2017 05:44  

Hey all,

No backlight.

Anyone got ideas?

Edited: 2 months  ago

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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
20/12/2017 16:32  

Hi

Did you download the PDF schematic with BRD file from MacBook Schematics section?

Just open them both and press in layout J9000 and look at pins from 21 to 29 are for backlight press on each and see where they go not forget to switch the sides because components are on both sides plus search them in the PDF diagram to see how each is connected.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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Obahan Aygun
iExpert Australia
(@gadgetfix)
Eminent Tech Registered
Joined:7 months  ago
Posts: 34
21/12/2017 02:49  

Thanks for your help. Pins are fine.

Also i do get 3.3v on pin 3-4.

i am thinking maybe the problem is U9701

 


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
21/12/2017 18:35  
Posted by: Obahan Aygun

Thanks for your help. Pins are fine.

Also i do get 3.3v on pin 3-4.

i am thinking maybe the problem is U9701

 

I gave you a hint on what to look for but you begin to go by other path.

Go to page 77 of PDF and see all BL components now find each and test the small ones then arrive at the last most complicated things like reball, replacing of IC's.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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