okay...if the number goes out momentarily on the credit display when opening/closing the latch, then the door optics are fine.
Thanks for double-checking.
Look in the photo I've attached below of one of your I/O cards.
Do you see the rather large header pins that run from the white housing connector to the circuit board in the metal box opening under the handle?
That is on the component side of the I/O board.
If you flip the I/O card around, usually there is just a clear plastic cover protecting the circuitry from being shorted out and is often referred to as the non-component side.
You cannot really see all the IC components on the inside of the card because of the metal framing that the circuit board is attached to.
Offhand, as I am not near an S2000 at the moment, I believe the circuit board is held to the metal box with four screws.
If you remove the screws and place them aside, you will be able to lift off circuit board from the box frame and be able to visually inspect the component side of the I/O card UNDER those header pins.
What I want you to inspect is that area on the circuit board that I've highlighted in red under the header pins.
Maybe take a good photo of it and show us.
The area where I've highlighted in red is where there are certain chips on the I/O card that act sort of like "fuses".
When an i/o board is overloaded or shorted out, those chips will many times....blow up....you may not remember but if they blow up, you actually hear a "pop" sound....sometimes there will be an unusual smell too.
You WILL see the damage done to an I/O card on the component side when it has been mistakenly been removed or inserted while the slot machine's power switch was "ON"....this is why we tell people to turn OFF the power switch when installing or removing circuit boards.
Believe me I know, I've blown up a card or two because I've forgotten to kill the power..
I am certain that JIM has sent you a tested, working card as he is a known very experienced slot tech....I just don't know your experience of working with these machines and you may have blown an I/O card without knowing.....this is a way to check things.
You've said there is an 801 version on the door panel.
That would be for a single row of deck buttons.
If your 801 card is good, then certain lamps on deck buttons will light up after you press the white test button on the MPU for about 2 seconds.
If the buttons respond to you touching them to maneuver thru Settings Options, then you know the 801 I/O card is still good.
There's another I/O card in the cabinet against the MPU cage wall.
Earlier, in Reply #9, member Lookes asked you if it was connected to a backlit reel driver board.
I wish you would have answered him.
The reel driver board would be located on the rear cabinet wall behind the reel shelf.
There should be a harness going to that board from the cabinet I/O board if you have backlit reels.
He wanted you to power off, disconnect it and power up.
Good luck...I'm sure there's more suggestions from our members for you to try!
We all want to see your machine up and running the way it should be.