• “KVM switch problems” on page 172
• “USB device does not work” on page 172
All or some keys on the keyboard do not work
1. Make sure that:
• The keyboard cable is securely connected.
• The server and the monitor are turned on.
2. If you are using a USB keyboard and it is connected to a USB hub, disconnect the keyboard from the
hub and connect it directly to the server.
3. Replace the keyboard.
Mouse does not work
1. Make sure that:
• The mouse cable is securely connected to the server.
• The mouse device drivers are installed correctly.
• The server and the monitor are turned on.
2. If you are using a USB mouse and it is connected to a USB hub, disconnect the mouse from the hub and
connect it directly to the server.
3. Replace the mouse.
KVM switch problems
1. Make sure that the KVM switch is supported by your server.
2. Make sure that the KVM switch is powered on correctly.
3. If the keyboard, mouse or monitor can be operated normally with direct connection to the server, then
replace the KVM switch.
USB device does not work
1. Make sure that:
• The correct USB device driver is installed.
• The operating system supports USB devices.
2. Make sure that the USB setup options are set correctly in system setup.
Restart the server and press the key according to the on-screen instructions to go to Setup Utility. Then,
click Devices ➙ USB Setup.
3. If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the
server.
4. Replace the USB device.
Memory problems
Follow this procedure to resolve issues related to memory.
•
“Displayed system memory less than installed physical memory” on page 172
Displayed system memory less than installed physical memory
Note: Each time you install or remove a DIMM, you must disconnect the server from the power source; then,
wait 10 seconds before restarting the server.
Complete the following steps until the problem is solved.
172
ThinkSystem ST45 V3 User Guide
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