Don't touch that CABLE!
Last year, I think it was, I had a call from one of our offices. They had moved the big multifunction machine(print/copy/scan/fax) around a bit, and had managed to rip out the fax cable...
They had found a similar cable but that didn't work...
(I knew that the office had had 3 major rebuilds of the wiring in the years since it was built, and also that the first fax in that location had been a bit 'special', so the odds were that the cable had been a custom job)
I told them to NOT touch the cables, then jumped into the car and set off for a 1.5Hour trip.
Guess what I found when I arrived?
Not a single cable!
The one they had borrowed, they had of course returned, and the broken one they had tossed out somewhere.
So instead of spending 5 minutes making a copy of the old one, or just crimping on a new connector, I spent an hour digging through 2 decades of dust and grime following the cabling to the end, and replacing every custom job with standard cables.
The same with printers.
If someone calls me to tell me there's a paper jam, and that the 'paper ripped' when they tried to fix it themselves, I always tell them not to throw away the pieces. Which they do anyway...
(Luckily, they usually throw them in the closest recycling box, though, so I can find them)
Why I want the pieces?
So that I can tell if there's still paper trapped in the machine or not.
(I'd rather spend a minute with a paper jigsaw than 15 minutes with my hands inside a contraption of sharp edges, fiddly screws and god knows what, making certain the bl**dy thing won't crash again 5 minutes after I leave)