Emergency stop, machine down all because of one bad termination.

I had a hunch it was an Arcnet connection. Found this. Insulation tape, broken solder, shield not even connected. Full cut and re-terminate, proper job. My soldering skills are a bit rusty, but when the machine is down you do what you have to, even it it means holding the solder with your teeth. One surprise, the sub-D plug is plastic. No obvious way to ground the shield. I'll need to get creative on that. And for the record, I'm very glad Arcnet is history.