The problem with Scorpio

Hello All! Help me figure out the problem. The situation is as follows. There is Scorpio, there is SMUC, There is a zone controller for keyboard and mouse. So this is the controller For some reason it doesn’t want to work with ProfPZU when I try to access the computer monitor hangs reliably or starts to glitch terribly, with a regular ROM everything works ok. I need to get the computer to work together with the specified controller and SMUC. What does it have to do with everything working fine at the beginning, but it stopped working completely TURBO, and after I poked these controllers in different combinations with with or without a bus expander, at a certain moment the keyboard controller stopped working with ProfPZU. Now I'm sitting with SMUC and a buggy TURBO. Tell me at least approximately where to look for the reason, it’s obvious that something burned out in computer. Best regards, Stanislav.