Checking if a power supply works is a crucial step in troubleshooting and maintaining computer systems. A power supply converts alternating current (AC) electricity from a wall outlet into direct current (DC) electricity that can be used by computer components. A faulty power supply can cause a variety of problems, including system instability, data loss, and even hardware damage.
There are several ways to check if a power supply is working properly. One simple method is to use a multimeter to measure the voltage output of the power supply. The voltage should be within 5% of the specified voltage for the power supply. For example, a power supply that is rated for 12 volts should output between 11.4 and 12.6 volts.