I remember silly support calls I had on those things.
1) My floppy is stuck in the drive and I can't get it out.
Solution: The space betweent the top of the floppy drive and the case was open enough to confuse some people, they actually put the 5 1/4 floppy in the slot above the drive and the floppy ended up INSIDE the computer.
2) My computer won't work, the screen is just white.
Solution: You have the monitor on only. You need to turn the computer on.
Not the funniest, but I got calls once a week on those.
Oh, I had to replace a NIC in a TEMPEST Z248 system. A TEMPEST is a government secure rated computer. The case had 3 or four rows of screws running the length of the top of the computer. You had to take out about 30 or 40 screws just to get the cover off. Once you had that off, you had to remove some mesh shielding to actually see inside of them. That was when I got my first cordless screwdriver.