Hello there!
Today iam working on a 1697 pcb with the follow problem: all buttons works perfectly, but, if a press the "center button! (big X ) its remain pressed forever.
I am testing with only the boards off, jumper with a tweezers.
The button have 2.2v and gnd in the respectives pads, remain the same after press...
I see the problem in this test site (
https://html5gamepad.com) , B16 remain 1.0 afer a press!
I replace the MCU BOARD and same problem happens.I replace Q8,Q3, checked D27, R27 and R24.
I see a little oxidation in the U4 (thats scary me), on C45 side.
Any tips?!