effectively what I still want is ...
- a full CMM (component maintenance manual),
- a full system block diagram
For sure a CMM will not supply you with the requested information.
For test and fail isolation the computer will be connected to an
ATEC Series 6 testbench.
The computer is a modular construction like any modern black box, if a card failed the card is replaced not the failed component on the card itself.
For obvious reasons (e.g. Intellectual property, trade secret, terrorism) a full logical diagram is hidden for the public,
but PJ2 posted a pitch channel logic for A320 a while ago:
FWIW you will not find beancounters in flight operations only, they are well spread over the world and also in the MRO business.
The suppliers of such sophisticated equipment are negotiating - aircraft life term - maintenance contracts (starting with B787)
for their equipment so all technology remain within the vendors company itself.