Power Supply Tester
A power supply tester is a diagnostic tool used to verify the functionality and output voltages of a computer power supply unit (PSU). It typically connects to the PSU's main connectors and displays readings for key voltages like +12V, +5V, and +3.3V, helping identify issues such as under-voltage, over-voltage, or no power output. This tool is essential for troubleshooting hardware problems in desktop computers, servers, and other electronic systems that rely on PSUs.
Developers and IT professionals should use a power supply tester when diagnosing hardware failures, especially in scenarios where a computer fails to boot, experiences random shutdowns, or shows signs of power-related instability. It provides a quick, safe way to isolate PSU issues without connecting to a motherboard, reducing the risk of damaging other components. This is particularly useful in development labs, data centers, or when building custom PCs to ensure reliable power delivery before system assembly.