What is a common symptom of a failing power supply in a computer?

A common symptom of a failing power supply in a computer is the random rebooting of the system, especially during startup. This behavior often occurs because the power supply may not be delivering a stable voltage, causing the computer to lose power intermittently. Insufficient or fluctuating power can lead to the computer failing to boot properly or shutting down unexpectedly while in use. The instability in power delivery makes it challenging for the motherboard and other components to operate correctly, which generally manifests as random restarts.

While slow software loading, frequent software crashes, or graphics display issues are also potential signs of hardware problems, these symptoms can stem from various other components such as the hard drive, RAM, or graphics card. In contrast, the symptom of random reboots is closely tied to the power supply's ability to deliver consistent power, making it a more direct indicator of its potential failure.