Console? What console..
Yes, sometimes your machine won't work if the system teletype (it was the 70's) is on the fritz. Luckly, we transported the inner workings of the ASR35 (EBCDIC) off to get fixed. On the way back from doing the transport, I thought a bit, and hooked up an idle computer (HP 2114) to take the place. A little software later (translation from EBCDIC to ASCII) and it worked. Good thing as well. The repair was to take a day, and ended up taking three as I remember it. When returned, it snapped back in, and all was well.
Of course things like this are hard to forget. I needed to a more urgent repair a year or so later, and took out the old hardware and slapped it together again. We had it that way for about 5 days as I recall. Somehow those "temporary" lashups have a life of their own.