All the bottoms from the left side of my back bone don’t work

How to I replace the left side of my back bone and where can I fine the parts

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I’m having the same issue, I found only one reference in an obscure Reddit topic saying its the flex´s fault. Any info on this???????

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Similar problem here. Left side mostly work but the inputs get jumbled up and the share button is constantly pressed. Disconnected L side MoBo and the phantom share button keeps pressing. So strange.

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