Hi, I've been reading lot of posts in this forum trying to find the solution but gets a point where I just don't know enough about fanuc to understand the issue.
I've bought a John Ford vmc-1024 3 axes mill, it has a Fanuc 0M control, it says alarm 940 PCB Error. Looking into a small google manual this equals to "defective mainboard / memory board". First I replaced the main board, and the error keep the same, then I replaced the memory board and the error is the same, so I'm lost. I tried clearing the memory holding delete + reset while power up (I have a paper with the parameters so its not a problem).
And just to be a little more weird, my memory board reference is A16B-2201-0101/08A exactly the same that I bought on ebay (same for mainboard). If I put a friend memory card out of a 0T lathe with reference A16B-2201-0101/07A the control boots up but only shows two axis. This makes me believe that not only the memory card reference matters but also the eeproms mounted in it, is this correct? Could someone explain me what contains these memories ? Is fanuc related or john ford related? I'm guessing that if a need the memory card from the same exactly machine is going to be really hard to get.
The three memory cards I have, first one is the original, second one the replacement I bought and last one from my friends lathe.
https://imgur.com/a/BOQdx3d
Thanks for your time.