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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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CTRL key and bloc maiusc (Caps Lock) LED don't work

Hello everyone.

Recently i changed my macbook pro battery cause the old one was dead.

After installing the new battery everything looked normal except the macbook turning off at 40%. Problem solved using the combination to reset the SMC.

After awhile i started a game in cloud gaming where i use ctrl key to crouch and i noticed that my PG didn't crouch.

So i opened the keyboard visualizer and i noticed that every key works except for the left ctrl key. Also the green bloc maiusc (Caps Lock) LED stopped working, the key works fine but when bloc maiusc is active the LED still off. I already tried to clean under the ctrl key and i removed a lot of dirty thing but the key still not works.

How can I fix both ctrl key and bloc maiusc led?

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The keys contact surfaces often get dirty so the plunger carbon block is unable to close the circuit. The only way to fix this is to replace the keyboard unit.

Now the fun part! Which version of MacBook do you have? Apple offered quite a few different local language keyboards. So I noted you used the Italian term bloc maiusc for Caps Lock. So do you have an Italian localized keyboard or have just an ISO keyboard with English keys?

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Sebastiano Onofri será eternamente grato(a).
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