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Yet another "Display's NETPLEX link is down"

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qbert:
Wheels spinning, turn jackpot key with the door open wheels should stop.

Try reseating most of the plugs going to the mother board and the multi colored ribbon cable going to the motherboard on both ends. Have you removed the green battery and U16?
What is the voltage of the coin battery in the MPU?
( turn the jackpot key a few times to reset the ram error after you replace or check the coin battery )
There is also a coin battery in the top box.
You will need an old computer keyboard with the small ps2 plug to get into the bios after a battery change up top.
Set the time and date then load optimized defaults and save.
I would start with the plugs first the move on down my list.

Crrispy:
Thanks. Not had much time for this in the last weeks, but next on my list is the battery and U16 :)

Crrispy:
Hello,

I'm digging this up, I can't believe 5 years are gone already, but I stopped exactly where this post was left. Now I've decided to seriously try to fix it if I can, otherwise dismantle it and sell parts, because something like 99% must be OK. I'd rather fix it, it's still a beautiful machine and in excellent condition.

Now of course I've another error saying "Call Attendant" on the bottom display and the top computer was waiting in initialization phase. I opened the door  then used the jackpot key and it said "battery low", then asked me to press the mpu button, close the door.  At this point the top computer finished booting but the battery error remains on the lower display and the top computer also says call attendant on the blue background screen.

I have ordered a CR2354 battery that I should get tomorrow, and meanwhile I finally removed the green battery and U16.

Also, is there a way to stop the bi-tone super loud alarm when you open the door? It's very annoying and nothing seems to be able to stop it except power off?

Thanks.

Stayouttadabunker:
Post good photos of your MPU board...especially around that green Varta battery area.
I'm glad you've taken that Varta battery off finally, but if you didn't remove that battery & U16 five years ago, the MPU might be finished from battery acid leaking all over?

It's pretty easy to stop the bi-tome alarm....unplug the speaker connecters on the harnesses...lol
There's two speakers with Molex connectors up top, and one down behind the coin tray.
Of course, for the time being, you will not have ANY sound until you learn when that alarm goes off and hook it back up.

"Battery Low" is the other battery on the MPU board.
Without any power to the MPU for last 5 years, it's most likely dead, and needs replacement.

Qbert is the best guy on NLG for help with your machine model.

Crrispy:
Thanks. Hopefully, no battery leak, I was lucky. I was indeed pretty stupid to leave it there 5 more years...   :fryingpan:
We'll see how it behaves as soon as I get the new 2354 battery. I think it will be back to the initial netplex down issue.

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