He had purchased a fairly high-tech voltmeter, but there were so many settings and options he never figured out how to use it. So here’s a primer for any voltmeter. First, find the on/off switch.

With this guide, you'll learn the ins and outs of troubleshooting your home and household electronics using a handy multimeter.

Want to know how to use a multimeter properly? Here are five common ways to put your digital multimeter to good use. Note: These instructions are applicable to most multimeters.