What is the role of the voltage regulator on a hard drive PCB?

The voltage regulator on a hard drive PCB is responsible for regulating the voltage supplied to the various components of the hard drive. The voltage regulator ensures that the voltage supplied to the hard drive is stable and within the specified range, which helps to prevent damage to the components due to overvoltage or undervoltage. The voltage regulator is an essential component of the hard drive, as it helps to ensure reliable and stable operation. If the voltage regulator is damaged or malfunctioning, it can cause the hard drive to become unresponsive or fail to boot.