Fan Problems; Intermittent Problems - Lenovo ThinkSystem SR850 V2 Maintenance Manual

Operating system cannot be installed to NVMe drives that are set with Intel VROC
As Intel VROC presently does not support operating system installation, adopt one of the following options to
solve the problem.
• Disable VROC.
• Install the operating system to other types of drives, including hard disk drives or solid state drives.

Fan problems

See this section to resolve issues related the to fans.
• "Abnormally high RPM (revolutions per minute)" on page 235
Abnormally high RPM (revolutions per minute)
Complete the following procedure to solve the problem.
1. Check to see if the system inlet perforation or heat sinks are clogged.
2. Make sure that all air baffles are correctly installed in the server.
3. Check the thermal grease on the processor , and make sure it's not contaminated.

Intermittent problems

See this section to solve intermittent problems.
• "Intermittent external device problems" on page 235
• "Intermittent KVM problems" on page 235
• "Intermittent unexpected reboots" on page 236
Intermittent external device problems
Complete the following procedure to solve the problem.
1. Make sure that the correct device drivers are installed. See the manufacturer's website 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 Lenovo XClarity Provisioning Manager V3 system
setup interface. Then, click System Settings ➙ Devices and I/O Ports ➙ USB Configuration.
b. Connect the device to another port. If using a USB hub, remove the hub and connect the device
directly to the server. Make sure that the device is configured correctly for the port.
Intermittent KVM problems
Complete the following procedure to solve the problem.
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 server.
3. Test the console breakout cable on a working server to ensure that it is operating properly. Replace the
console breakout cable if it is defective.
Keyboard problems:
.
Chapter 5 Problem determination
235