Power Supply Fan does not Work or Emits a lot of Sounds

The power supply fan is not working when the system is switched on or makes a lot of noise. The problem occurs if the power supply fan is not functional or if lot of dust has accumulated on the fan motor.

To troubleshoot this problem:

1. Shutdown the system,remove the system case cover and clean the dirt or dust from the fan and power supply unit with a vacuum cleaner or with compressed air.
2. Check the power supply fan and replace it if it has any defects