alexG

thanks a lot. will check that. Any idea why the new board create issues? I tried with both EPROM (old and new) and same issue.

the old board works but i have issues with it, it is delivering 2-4 spirals each time. I ordered the new board and new EPROM (same version as previous at the end) and the new board doesn't work.

Hi again, I cannot perform the ram clear. Pressing the <exit> does not do any good. I tried the new board with the old EPROM and same issue. I have attached pictures of the errors i get.

thanks for the quick answer. I will check to see if it works

I have finally purchased a replacement board with the latest Eprom, but the machine is now showing the message "No ram". what did i do wrong and how to fix it? Thanks

Hello, For one of my oldest unit, i need to change the control board from what i know (several spiral selling at once). I am looking for a replacement of a kind (see picture attached) with part number 1586017 but i cannot find any available. I see some newer model control board without the E-prom. I have never done this yet and i would like to know: - what is compatible with my unit? the national 167 control board? - which e-prom to buy for the new board? Can i just reuse my current e-prom (v158.29)? - any compatibility issue with the display board and lcd? I read topic where people had display issues after the swap. Thanks for your help!