Dell NM176 owner manual Troubleshooting System Cooling Problems, 107

Action

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Run the appropriate online diagnostics test. See "Using Dell PowerEdge Diagnostics" on page 117.

2Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

3Open the system. See "Opening the System" on page 54.

4Ensure that the power supply is properly installed by removing and reinstalling it. See "Power Supply" on page 73.

If the problem persists, remove the faulty power supply. See "Removing the Power Supply" on page 73.

5Install a new power supply. See "Installing the Power Supply" on page 75. If the problem persists, see "Getting Help" on page 127.

Troubleshooting System Cooling Problems

Problem

•Systems management software issues a fan-related error message.

Action

Ensure that none of the following conditions exist:

•Ambient temperature is too high.

•External airflow is obstructed.

•Cables inside the system obstruct airflow.

•An individual cooling fan has failed. See "Troubleshooting a Fan" on page 108.

Troubleshooting Your System

107