Ohhh... dude!
What you have there is classic Ultimation problems, sounde like things have been allowed to get way out of hand! -Doesn't the studio have a tech? -It sounde like they don't, and that's a big red *** in my book...
Anyhow, that's why Brandon built the jig. You can fix them if you have a clue what you're doing, but you need a console to power them up, host them etc. The problem in studios used to be downtime, though most studios nowadyas are hard up for clients. If the studio has lots of empty time, you can try yourself, but I never worked on Ultimation repairs, the only SSL automation repairs I work on are regular VCA automation on the G and E series, and the J/K series later, improved, more reliable ultimation-type system. (though they stopped calling it ultimation).
Ultimation has to be calibrated regularly to maintain decent tracking between the VCA and the linear fader path. Depending on the type of failures (you didn't mention if they're all dead in the same way, or lots of different faults) you may be able to do them yourself. The moving faders are basically servo-driven, position sensing, but with the audio signal path as well. There's a lot that can go wrong, and I know Brandon started to specialise in the darned things, which is why he started selling the jig.
Keith