Taking off the case was hard because the case is heavy. "two or three people are needed to safely lift it out of the way", the service manual says. It was definitely three people. You need to remove four bolts and some cabling, and then it can be slid and lifted out of the way of the internals. 

And here she is, after a bit of a vacuum and wipedown with a wet shammy: 

Source is on the left, motors are in the middle, detector is on the right. NBD. The vast majority of the screws and everything is for shielding. The right side is more heavily shielded and there were some misc. pieces of lead that were literally taped on to I guess weak spots. Some of them had fallen off. Not concerning at all --- or at least, not until my x-rays start to freaking work. 

Speaking of that, I took a look in the registry and found flags for "automatic control on" as well as references to the shutter servers being on port 3 (the same as the main controller, for some reason). Unfortunately, flipping these values didn't do anything, at least as far as I can see. Still can't connect to the shutter server, and still can't switch the x-ray control to manual. I would REALLY like to be able to try and get the x-rays to turn on before pulling it out, as a full replacement will be a big (and not cheap) ordeal. 

.

Along with cleaning it, I also greased up the motors and door with some teflon lube (trifoil) that was mentioned in the manual. The only one I'm not sure if I did correctly is the rotary stage, since it can't be turned by hand/screws and stuff aren't visible. 

Here's a gallery of the inside that wasn't visible before:

There's some kind of control box, lots of pass-through connectors, and also knobs for adjusting pretty much each axis, as well as the source. 

Finally in terms of experimentation for the day, there was a cable that I thought plugged into the shutter (why you no work), but putting a few volts on that didn't do anything. Hmm. 

Traveling for work again this week --- the machine will be just covered by a tarp. I'll take another look next weekend, and probably take the rest of the shielding off so I can take a look at the source and see if there's anything super duper obvious (unlikely), which will also serve as practice since I plan on taking the definitely bad source out of the other machine.