My special one
but have you encountered one whose specialness did not extend to fiddling with a brightness knob? Or finding that pesky power switch?
Early 80s, minicomputer pathology lab systems, large disk drives each with a chunky power button on the front illuminated when switched on. Depending on the amount of storage needed, and on whether they had mirrored disks, the number of disk drives could vary from two to six.
A customer phones me up one morning. He's a consultant biochemist, doctorate and umpteen qualifications, so he has some intelligence, but of course he isn't - and doesn't have to be - a computer expert.
"The system's not coming up!".
So we start going through the usual stuff - it closed down OK last night, there IS power to the console and main processing unit, etc etc.
I didn't know his exact configuration, so I asked "Are all the disk drives turned on?".
"Oh yes, of course!".
Just then, a colleague who did know his configuration came in. I gave him the phone.
"Are both disk drives turned on?".
"Oh no, one of them isn't.".