I have been looking for a fix but none of them seemed viable, until I myself found out, not sure if this has been discovered yet , so Ill post it here.
Basically you need to take off the trackpad cable, and at the bottom end of it, where the gold plated connector is, u need to add a piece of any thicker tape on the other side of the gold plated connector, this way, the cable makes enough of a connection with the connector, and it will begin to work again. Reason for this failure is a design fault, where the connector gets looser and the gap gets taller, so the cable no longer makes connection.
I have done this fix on both the 13 inch and 15 inch 2015 macbook pros with the same issue, and it worked.
Basically you need to take off the trackpad cable, and at the bottom end of it, where the gold plated connector is, u need to add a piece of any thicker tape on the other side of the gold plated connector, this way, the cable makes enough of a connection with the connector, and it will begin to work again. Reason for this failure is a design fault, where the connector gets looser and the gap gets taller, so the cable no longer makes connection.
I have done this fix on both the 13 inch and 15 inch 2015 macbook pros with the same issue, and it worked.
