SCPH-10010 A: This one is easier to fix. (I didn't open the controller to show the details, but focus on these 2 spots shown in the pictures)

Look for any corrosion on the soldering joints.

Look for any discoloration on the Flexible PCB and its connector.

Clean everything with Q-tips and Isopropyl alcohol.

Remove the small cushion at the back of the controller shell.

Take 2 cm of masking tape, roll it and put it under the cushion to give more pressure to the cushion on the flexible PCB connector.