No worries - I saw zero replies and a real issue…
My understanding is:
some A100 units can talk to each other through the A100 bus board - this means that you don't have to patch from the front panel (although I assume patching from the front panel overrides this internal patching). There are limits to this - like you can probably only setup one or two connections, because they use the bus cable (and there's a physical limit to the number of independent bus cables that are free… To allow them to talk to each other you need to remove or relocate jumpers on the back (this will unbridge a connection, or possibly bridge a connection, and this will then send the signal down the bus bus cable.
Unless you have a compatible A100 setup, and want to connect a few devices via the bus board, then you don't need to change any jumpers.
Like I said - that's my understanding… but the point is: the jumper at the back connect or disconnect bus board talking… When you get it back, read the manual to make sure I'm right (I'm 95% confident you don't need to remove them - this would make sense, because it's the most useful factory setting to ship the product in: "don't talk via bus board unless user wants it to".
Hopefully that makes sense!
Don't forget to keep writing tunes while it's off on repair
… or maybe do some sound design and experimenting so that when it's back, you're pumped and ready to roll……………. A busy musician's a happy musician….