Gomez promised that schematics, documentation etc would be released very soon for Spike at Expo 2017. Judging by his body language and manner of speaking at the time, he was being at best economical with the truth ... and so it's proved.
4 years in January since the first Spike machine hit the market. It's inexcusable.
They don't want you to repair them. They want to gouge you hundreds for node boards that probably cost them less than $5 a pop, and $700-1000 for an MPU board (depending on Spike 1 or 2) that likely costs $40-70.