Anyone in the IT field dealing with hardware (whether it be building, repairing, or maintaining) knows that certain tools are required to get the job done. Much like a mechanic, we too need our screwdrivers and pliers. In fact, anyone who's interested in computer hardware should have a basic arsenal. But what about the extras? Today we'll be taking a look at a power supply tester, a handy little tool for diagnosing any potential or existing problems.