code 91nc need help clearing it

[trashman]

ok so im a fool i bought another bally. a cash wheel since it was big and cool looking. ok so i did a clear and got past the date/time part now i have this code 91nc.well maybe some one can help thank you in advance. this game is huuuge lol

[trashman]

ok so i read some other posting on here and they i have to change setting in 11 d can anyone give what setting i should change for this game.

[Sunrise Side]

91nc = no communication to bonus wheel. Is the cable plugged into the front left side of the MPU?

[trashman]

it was not and i didnt remove it when i did the clear,so i didnt  know it was to be pluged in..also now that i plugged it in the board and when i turn game on it show 91 then i think 51 and then you get some type of noise then its back to 91nc and thats it.i pulled the hopper and looked for plugs that may have been  unpluged but didnt find any but there was like a phone line and some other wires behind reels that where not hooked up.and looks like a board maybe missing on what would be the back of the machine behind reels

[Sunrise Side]

To clear the stacked errors you have to open and close the main door 3-4 times.

[trashman]

i opened and closed door 15 times didnt change any thing

[Sunrise Side]

51 error code is a switch error.  Three  switches need to be bypassed. The bonus wheel has a switch in the top . That's probably why you have 91 & 51 errors.  Also the cash can door and the belly glass door have switches which are all connected.  Best to bypass all 3 switches.

[trashman]

ok  i mess around with it this weekend thank you .

[Nurbo]

Hi,

The only solution I found for getting rid of this 91nc error was to change the MAIN chips by a different version.

Otherwise no clear RAM (partial or full) has changed anything. 

I plan to do a post on it explaining everything I did.

Nurbo