Hi the sustain boards in this case ;-)
There are two of the x, y.
If you replace these it should clear up the issue. Also I would unplug every connector one at a time and re connect it as if there is dust or a poor connection you will have this issue.
If that doesn't solve the issue, then the pane itself is bad.
But usually this will solve your problem;-)
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.