HT204540: If your wireless or USB keyboard doesn't work
Learn about If your wireless or USB keyboard doesn't work
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Helpful answers
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Mar 5, 2016 7:53 AM in response to Dianne155by OGELTHORPE,It is always helpful if you indicate the EXACT model/year MBP that you have.
On older MBPs, the battery occasionally is known to expand and interfere with trackpad operation. Open the MBP and inspect the battery. If there are signs of expansion, replace the battery immediately.
Ciao.