Okay.
I recieved the display, the motherboard and the MPU in the mail this morning.
First thing I noticed was a horrible battery holder install.
The battery soldering pads were completely falling off of the MPU. ( From being overheated too long).
Someone tried to stuff the holes with wire in a vain attempt to make continuity to the backside...
Anyways, I ripped everything off, and re-soldered everything back the way it should be.
I tested it in my bench tester and found out your MPU was stuck in the [61-1] Loop.
I ran a Clear chip and re-set up the board in the options.
It's now set up for .25 cents and to lock up at 1000 credits.
I hooked up your long reel glass display panel and it works fine.
But when I installed the motherboard, there was no display although the machine accepted coins and played normally - just zero display.
When I took the motherboard out and rehooked back my tester motherboard, your display came back on.
I tried everything but I'm certain that there's something wrong with the continuity on the motherboard somewhere that concerns the display circuit lines.
It can be a broken trace, or a cold-solder joint too.
I re-heated solder that runs on the power traces and MPU pins to the display.
I also sprayed De-Oxit on the pins for the MPU and header connections.
SOMETHING is wrong with that motherboard.
There's quite a bit over overheated looking areas on the board as well.
There's excessive staining all along the MPU header pins that plug into the motherboard...it hard to tell what it was...soda, flux?
Something hot fell onto the motherboard and it's has lost continuity between the component side and non-component side.
There's tiny, minute solder bits everywhere on the board.
I suggest that you get another motherboard to replace this one.
You will need to get a hold of member Jim of Midwest slots for a motherboard and ask if he has a Clear and SET015 chip for you as well.
If not, maybe member RB will have some chips for you.
Your SP731 and SS6624 software chips are fine.
PM your email address to me so I can give you more information.
You guys have to see what I saw when I opened the box...WOW!
Click on photo below to enlarge if needed...>>>