Repairing a slant top 12 times pay slot machine

[Xray1281]

Hello everyone sorry if I this don’t the correct place to put this, I’m new here. I recently acquired this slant top 12 times pay slot machine. For the most part it works besides to issues I. I get a ram error and an error that says “Game EPROM CRC Mismatch -0xB000001. I replaced the cr2025 battery on the motherboard. I have no idea if that did anything to help this situation. It doesn’t seem like it. So I’m really stumped on how to go about fixing this. I want to have it done by Christmas to give as a gift. Any help would be greatly appreciated. Thanks for taking the time to read all this and for any help you may give.

[Xray1281]

Pics

[Xray1281]

More pics

[a69mopar]

you likely need to perform a ram clear on the machine.  the s2000 procedure should be posted here.  did you turn the attendant key? 
i'm only on for a few minutes, may respond more later.
Thanks,
Wayne

[a69mopar]

https://newlifegames.com/nlg/index.php?topic=21511.0

[Xray1281]

Not sure about the attendant key. This is what the key slot area looks like

[sixcardmark]

I think the attendant (jackpot) key is located under the left side of the arm rest on a slant top S2000.  Turn it about 4 times and follow instructions on the vfd.

[Xray1281]

I checked under there it didn’t seem to be there

[Xray1281]

I just figured it out the key was switched out with a on of switcher

[Xray1281]

So I figured out the key was swapped out for an on off switch. I was then able to fix the ram error. However I am now having two new problems. 1. I went and tested the sound and there was none. 2. The bill reader won’t even take in a dollar to read and the 50 dollar sign is lit up red. Any ideas on where to start there? I checked the sound in the settings and it’s set to 5 and when I test the sound no noise’s are made. I checked the bill reader and it’s set to accept bills.