After doing the basic of the basic trouble shooting on the control box issues on the Barlume, I decided to do some more digging. I noticed when I took the box apart that the touchpad did indeed have a ribbon connector so I figured why not swap that component between the boxes. Turns out that was the cause of the problem. I did some delicate poking and prodding at the touchpad membrane and found it is glued to the faceplate of the box. I gently pried it away and found:

That is the button that corresponds to the 4th LED that was stuck on and hopefully why the control has no real function.

The tactile buttons are not very "springy" and some feel like they are slow to return to the "idle" position. With any luck the touchpad can be repaired.
Having read about the espresso machine at a shop in the UK that exploded (which happened to be an Elektra Barlume), I have been a little nervous about leaving this machine unattended. I came back the other night from a quick trip to the store to find the pressurestat stuck, boiler pressure at 2 bar, and the safety valve doing its job. I promptly replaced the diaphragm on the p-stat, cleaned the contacts and swapped the leads from one of the old contacts to the unused one.
Once I get the control box taken care of, I should be getting close to putting the machine back together. I will need to buy a bulb for the neon at the back and polish some chrome, but it should clean up nicely.