I went ahead and opened A11. I believe I located the A5 board, (No. That's the the Volt Regulator. Part of the A11) and it looks old and rough. (Yes sir!) I still have not been able to determine where K5, (The A5 card is in the A27, Special relay box. And I would still take a look in there also.) is but there is definitely some burnt resistors on the board. I attached pictures of the board.
I am going to guess, that the card will be very difficult to repair, Show me some pictures of the rest of A11, T1 and T2 might be burnt. There are a few folks who might be willing to fix/test your A11. There is also a guy who USED to have some extra A11's. Will shoot you his contact info. Get in touch with him and see what he might charge for one, if he still has one. Might be cheaper then repair/testing. One person who I know that would do repair/testing is a member of SS. His handle here is: PEAPVP. Send him a PM, ask about it. There are more I am sure.
Bad weather has caught me and had to close it up for the day.
Thanks for you help.