1.No power or randomly shutting off: One of the most common symptoms of a failing power supply is that it will either not power up, or will randomly shut off. If the power supply won’t power on at all, then it’s likely that the power supply has failed.
2.Unstable or fluctuating voltages: If a power supply is failing, it can cause the system to experience voltage fluctuations, which can be detected with a multimeter. This can cause instability in the system and can cause components to fail.
3.Excessive noise: A failing power supply can also cause excess noise and even humming. This could be caused by a failing fan, or other components within the power supply.
4.Overheating: Overheating is another sign of a failing power supply, as it will struggle to regulate power to the various components. This can cause components to overheat and can lead to system failure.
5.Increased power consumption: A failing power supply can also draw more power than it should, which causes an increase in overall power consumption. This can also cause excessive heat and can lead to system failure.
6.Smoke or sparks: A failing power supply can also cause smoke or sparks to come from the power supply or from other components. This is not only a sign that the power supply is failing, but can also mean that the system is in danger of causing a fire.
7.Visible damage to the power supply: Visible physical damage to the power supply is a sure sign that it is failing or has failed. This can range from visible damage to the case, to exposed wires and components that are burnt or scorched.