Diagnosing a broken microwave
A three-year-old microwave stopped heating. The diode was bad — confirmed with a 9V battery and multimeter — but replacing it didn't fix it, and the repair cost more than the appliance.
Dell Wyse 3040 CMOS CR2032 Battery Replacement
Replacing the proprietary CMOS battery connector on Dell Wyse 3040 thin clients using heat shrink tubing and standard CR2032 cells — $23 for nine units versus $90 for pre-made replacements.