Customer: Our computer won't boot. Come over and fix it.
Me: Please tell me what message you see on the screen which describes why the computer will not boot.
Customer: No, just come fix it.
Me: Okay, but we're charging for a service call even if I don't touch your computer.
Customer: Just fix it.
Me: (drive over, walk up to the office where the computer is at, pause at door and look in to read the screen across the room (younger me had much better vision) announce)
You have the mouse plugged into the keyboard port, and the keyboard plugged into the mouse port. Power the computer down and swap the connections and it will then boot.
Me: What do you see?
Them: <click> <click> <click> Nothing.
Me: What are you doing?
Them: <click><click><click> Nothing.
So I've been doing it in person or don't do it at all. Too many hours trying to visualize what in the world might be on the other person's screen.
The reason I'm moved to comment is two things: one is that my daughter in college had me help her file her taxes by starting with FaceTime on her MacBook, then sharing the screen so that I could see exactly what she was doing. She's not technically inclined and it wasn't something that I suggested, she figured out how to do it herself.
The other thing is that my mother-in-law is 90 and also not a techie. But I've been able to help her with 1 or 2 issues remotely because she's able to take a photo of the situation with her cell phone and text it to me.
Things have progressed to the point where hopefully your customer could have been convinced to send you a picture and saved you a trip.
Counterpoint to the above was the customer who selected OS/2 for their computer --- we installed it and delivered, but the next day they called asking for help with installing a printer --- despite my only OS/2 experience being doing the install the previous day, the UI was consistent enough that I was able to talk them through this on the phone w/o a reference system to use in parallel (we only ever sold the one OS/2 computer and never did get a second copy in).
I would have included an RS232 D-Sub serial connector but those are still used if not for mice.
Also, from a visual standpoint, it’s quite appealing the way it is: https://www.qwertee.com/shop/tees/i-m-this-old-468
[1] http://john.ccac.rwth-aachen.de:8000/alf/ps2_76/ps2_76_2_ful...
PS/2 and AT refer to the IBM computer models where the connectors were introduced, of course.
Our computer lab in college had these NEC/AT&T 386 desktops that had RJ-11 keyboard ports that didn’t work anywhere else.
I'm 33 and also grew up with computers that only had PS/2 ports! Granted, USB existed, but the PCs I had as a youngster were old PCs.
I'm quite sure I literally used the adapter mentioned in the submission, as one of the first mouses I bought myself was a Microsoft mouse that came with a PS/2<>USB adapter!