The switch is probably OK. Just full of goo from a missing beer seal. The coin door connector block may have some bad pins that need replacing:
Quoted from mof:Is this a normal coin door switch for the audits?
The one on the right, starts the "all in one" test
And the one on the left doesn't do anything... perhaps it's a bad switch.
-mof201410-SW-switches.jpg 210 KB