Hallo,
I recently had the opportunity to repair several SciSys Mark V.
I have compiled the information in case it might be helpful to other users. Not intended to be a depth technical information.
Several things about this chess computer have surprised me: for example how easy it's to change the language; the origin of the damage to the Display; how risky is to leave an (exhausted) NiCd battery inside; etc.
I hope something will be helpful: at least enjoy looking at the pictures.
Sorry I could not translate everything (yet) into English. I hope that Google Translator will be helpful.
SciSys Chess Champion Mark V
Grüße,
Gerardo (aka Berger)