Lenovo ThinkServer RD550 - Manual (Page 166)

Symptom Action
3. Replace the mouse or pointing device.
A USB device does not work. 1. Ensure that:
• The USB cable is securely connected to the server.
If the USB device is connected to a USB hub,
disconnect the device from the hub and connect
it directly to the server.
• The device drivers are installed correctly.
• The USB controller is enabled in the Setup Utility
program. See “Using the Setup Utility program”
on page 49.
2. Restart the server.
3. Replace the USB device.
152 ThinkServer RD550 User Guide and Hardware Maintenance Manual