Just an update. I did a little surgery on the NVRAM battery socket and soldered some wires to it for a cr232 battery as a "jumper" and I was able to continue with the boot process. I'm able to use and get to the the v+ programming screen. Which I am not familiar with but I'm using a PDF manual to kinda make my way thru it slowly. When I command fdir into the c drive I'm able to see a lot of programs that are saved. If I try to enable robot for power up it says robot interlocked and or no robot connected error message. I'm not sure where that leaves me. Maybe it needs something loaded?
Quick note on the errors you're getting. The key switch should be set to AUTOMATIC mode. This allows robot control through the terminal rather than the pendant. If this works for the errors I have a feeling you will get another error regarding the Estops. The safety circuit not being happy may send you on an unnecessary goose chase.
The pendant connector also forms a permanent part of the safety circuit regardless of wether operating in Manual or Automatic mode. If it is connected the deadman switch needs to be held down even if the terminal is used to run programs/commands. If the pendant is disconnected there should be a dummy plug, if not the wires can be jumped. Hopefully I'll make some progress on my own one the coming few days to provide something of substance