
Rodent infested XT
Going back to the early 90s a client brough his shiny XT around complaining that the 5 1/4 inch floppy drive had stopped working.
Went through all the usual - check floppy drive controller properly seated (yes young fella, those were the days when floppy drives had their own separate controllers on their own expansion cards), made sure that the data and power cables were properly seated, replaced the floppy controller card. Still nothing.
Eventually I removed the drive only to discover that there was a rodent's nest under the 5 1/4 inch drive (fortunately vacant at the time), and the little critter had been chewing on the ribbon cable going to the drive head. I managed to find another faulty drive with a good head and cable and swapped them over, and away it went!
But how did the rodent get inside? Well that would be due to one of my pet hates: missing expansion card blanking plate... always fit blanking plates!