OP

Quoted from xeneize:

Gang:
Scared Stiff recently started registering false opto closures.
It is sporadic and across what seems to be all (or at least, most) of the optos. All of a sudden, you will get credit for hitting a ramp, or a locked ball, or entering the crate.
Every once in a while you can play a game without issue, other times the false closures start immediately with Ball 1.
I have repinned the .156 connector on the 16 opto board under the playfield and confirmed that I was getting proper voltage there. When that didn't resolve the issue, I replaced the 16 opto board with a new one from dumbass . Still no resolution.
So, it does not appear to be any one opto in particular, or a trough or a 16 opto board issue. I have not repinned the .100 connectors on the board, but they look good.
Again, the game was working 100% and was not moved or the target of an "event" which would provide a clue.
Any input is appreciated - thank you!

OP

Quoted from xeneize:

No corrosion on the board and NVRAM installed. I was doing some more observing last night and even experienced two resets.
Before I start doing more connector work, is it conceivable that I have an intermittent power issue that is contributing to both the simultaneous closure of multiple optos and now, system resets?

OP

Quoted from xeneize:

Installed the Kahr Pro Daughter board (man, that thing is sweet).
First night, the game played much better and I only detected one or two false opto closures over the span of 6 test games.
The next night it immediately began failing again with multiple false closures across simultaneously. False closures include: ramps, locks, crate, trough, etc.
Testing my voltage at the board, everything checks out on both the driver and the MPU. All of my LEDS are also lit/unlit/blinking as expected.
So, back at the well and looking for some help.
Thanks!

OP

Quoted from xeneize:

Well, I have not had any resets since the install. At one point, after all the switches went nuts, the Kahr board was lit solid blue (indicating that the 12V had dropped below 9V).
All of the optos are located between two columns (3&4) in the matrix (attached).
I don't think that the game warming up is a factor as I can power it up (after 24 hours of inactivity) and it immediately begin suffering from false switch openings.
[quoted image]

OP

Quoted from xeneize:

Bumping this back to the top. All optos are clean and check out.
My 12V regulated continues to sit at 11.7. Is that acceptable?
When I tried to play last night, the very first game had optos all over the place registering (as open) erroneously. The Kahr board is still lit steady green.
So, we know it is not header pins, the opto board, or bad opto switches.

OP

Quoted from xeneize:

eyeamred2u
Where did you have .062 connectors in the lower cab?
I can definitely replace any of those if suspect.