What is a symptom that may indicate a failing power supply?

A symptom that may indicate a failing power supply is random shutdowns or failure to boot up. When a power supply is malfunctioning, it may not be able to deliver a consistent voltage to the components of the computer. This inconsistency can lead to the system shutting down unexpectedly, as the computer may not have the necessary power to operate or may shut down to protect itself from potential damage. Additionally, if the power supply is not able to start up correctly, it can result in an inability to boot the system at all. This symptom is critical and often suggests that the power supply needs to be tested or replaced to ensure reliable operation of the system.