Hi Mark,
I think there is only one board for this machine, 24" or 44"
so either will work.
Also, there was a bad disc drive in the beginning,
many of them went belly up during initial deployment.
The ones left either were fixed or didn't suffer the defect.
The formatter seems especially prone to failure during downloads or any changes to the routine it runs.
So be careful when downloading updated firmware.
I believe the latest is the 7.xxx
First make the printer work again with the original config.
Make double sure of your connections and that there are no loose ribbon cables or connectors and clips.
Needs to be perfect.
I wonder if you would be blowing it to turn the machine off,
unplug everything,
release the residual charge from the machine by pressing the on button etc...
Then when I was sure,
unplug the formatter again.
This time be ready,
and don't push any buttons or omit any of the routine.
Turn the machine off on the front panel and run the service menu.
Do you see what I'm saying?