"A device that you're repairing will operate **absolutely perfectly** while you have it taken apart to work on it, but then when you get it all put back together and have all the cabinet-screws re-inserted, THAT'S when the device will decide not to work again."
To lessen the chance of getting "bitten" by Murphy's Law of Post-repair Reassembly, one should double-check everything on a refurbished device before putting it back together again.
Refers to da half-dozen "main" or "lifesaver" items --- duct tape, WD-40, expanding-foam insulation, hose-clamps, deck/drywall-screws, and zip-ties --- dat backwoods-bumpkins absolutely rely on to get them through da day, due to these products' incredible versatility and their robust/reliable ability to "save the day" in so many occasions.
The classic "redneck-repair six" can get you out of so many everyday jams that you could probably never catalogue them all. (Think, using a Pringles-can to splice a busted radiator-hose till you can get home, re-attaching a broken tail-light, or adding mirrors on your kid's bicycle if you need him to run an emergency errand downtown.) Just watch the Red Green Show if you need any proof or examples. :P
The built in autonomous self-repair system that exists inside the motor of a 2-valve 4.6L DOHC Ford V8 motor.
I hit a puddle and water got into my motor, causing an engine tick and a triple misfire, but after a week or two, the 2-valve Regenerative Repair System kicked in and the tick is gone and all 8 cylinders are firing normally.