the service panel buttons have their own header on the PCB, from your picture it looks like it's plugged in check to make sure the disconnects underneath the buttons haven't gone lose, if ALL of them aren't working then chances are the ground wire is bad. these can sometimes get pinched in the door so after a visual inspection I'd start with testing continuity on the ground wire. it could even be bad on the wire at the connector as those IDC connectors are trash and tend to be flaky.