if i can post this without being knocked.
It looks like these bare wires are from the coin switches.
i know u were saying u cant get any credits or tests from the buttons but do you get volume up & down from the 2 inner red buttons?
all 4 buttons have 1 common wire and if that one wire is not conducting properly on a plug somewhere then none of those buttons will work.
if you can see on the outer black switch in the photo there is a black wire and an orange wire, get a small flat screw driver and short those 2 wires out.
if u do this & the test menu comes up it will determine if you have faulty push button switches.
and before anyone says its unlikely that all the switches are faulty I came across this exact same fault on one of cave of treasures pins. all the buttons where stuffed.
if we determine that it is not the switches then we will move on.
also with those wires that are hanging there i would advise you cut the exposed inner conductor off at the end of those wires and put some insulation tape over them
