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Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB GDDR5 Video RAM

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Why are certain keys working intermittently?

My MacBook has developed a habit of not registering I, O or U unless I hold them down for several seconds. SOMETIMES nothing happens at all. Sometimes, they register. And, annoyingly, SOMETIMES, they work fine... but it's becoming a a real problem.

I have taken the keytops off and and cleaned underneath but I fear it could be a software issue or worse.

I have reset the SMC and PRAM.

I now use a bluetooth keyboard on top of my keyboard. What a pain!

Any ideas?

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A common issue is the battery has swelled up pressing on the cables.

Lets get a view of your batteries health, to get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question

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Remove the keyboard cable, clean the contacts with IPA, reassemble and give it a try. If it persists you may need a new top housing.

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