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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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Trackpad Keyboarding Unresponsive After Battery Replacement

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Following a battery replacement on the Macbook Pro 13” Early 2015, both the trackpad and keyboard are unresponsive. Additionally, the battery can be seen in Cocoa Battery as in poor condition and unable to hold a charge. The Macbook is being ran from the charger. I replaced the ribbon cable twice with no resolution to the issue. My thought is either the trackpad controller was damaged upon the installation of the battery or the battery itself is damaged and Apple limits / disables hardware like the trackpad, keyboard, fan, ports when operating solely from the charger. Any assistance is appreciated!

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I just replaced a batteries in 2 - 2015 15” Retina’s. One of them is perfect and the other one the keyboard does not work now. I did not unplug the keyboard on either unit. Just the track pad ribbon cable. Also blasted the PRAM and the SMC and that did not work. USC keyboard is plugged in now and that works, but that just a temp fix

Update (08/25/2019)

The laptop sees the USB internal keyboard when I look at the hardware system overview. I am thinking this is a software issue and not a ribbon at this point. It was perfect a few hours ago. A little puzzled.

Update (08/25/2019)

Come to find out there is a keyboard controller in the track pad connector. I removed the track pad ribbon at both ends and reinstalled. Works perfect.

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I would unplug the ribbon cable and with a good magnifier inspect both the board and the cable connectors. I'm wondering if you damaged one or two of the pins.

You should also check the I/O board cable as well.

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tvguy - Happy you isolated your issue as being a bad connection.

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the pin connections look great, no broken pins. @danj

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You talked about having issues with the external USB ports. The ribbon cable carries the signal to the logic board.

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Having issues with the bluetooth connection of the wireless mouse and keyboard, not external ports. Ordered a ribbon cable, if it doesn’t solve the issue then try replacing the track pad controller? @danj

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