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• The device is compatible with the server.
• The serial port is enabled and is assigned a unique address.
• The device is connected to the correct connector.
2. Reseat the following components:
a. Failing serial device.
b. Serial cable.
3. Replace the following components:
a. Failing serial device.
b. Serial cable.
4. (Trained technician only) Replace the system board.
Intermittent problems
Use this information to solve intermittent problems.
• "Intermittent external device problems" on page 217
• "Intermittent KVM problems" on page 217
• "Intermittent unexpected reboots" on page 218
Intermittent external device problems
Complete the following steps until the problem is solved.
1. Make sure that the correct device drivers are installed. See the manufacturer's Web site for
documentation.
2. For a USB device:
a. Make sure that the device is configured correctly.
Restart the server and press F1 to display the system setup interface. Then, click Advanced ➙ USB
Configuration.
b. Connect the device to another port. If using a USB hub, remove the hub and connect the device
directly to the compute node. Make sure that the device is configured correctly for the port.
Intermittent KVM problems
Complete the following steps until the problem is solved.
Video problems:
1. Make sure that all cables and the console breakout cable are properly connected and secure.
2. Make sure that the monitor is working properly by testing it on another compute node.
3. Test the console breakout cable on a working compute node to ensure that it is operating properly.
Replace the console breakout cable if it is defective.
Keyboard problems:
Make sure that all cables and the console breakout cable are properly connected and secure.
Mouse problems:
Make sure that all cables and the console breakout cable are properly connected and secure.
.
Chapter 4
Problem determination
217
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