Intermittent Problems; Keyboard, Mouse, Or Usb-Device Problems; Memory Problems - Lenovo 3633 Installation And Service Manual

Intermittent problems

Table 12. Intermittent problems and actions
Symptom
A problem occurs only
occasionally and is difficult to
diagnose.

Keyboard, mouse, or USB-device problems

Table 13. Keyboard, mouse, or USB-device symptoms and actions
Symptom
All or some keys on the
keyboard do not work.
The mouse or USB-device
does not work.

Memory problems

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.
Action
1. Make sure that:
• All cables and cords are connected securely to the rear of the server and
attached devices.
• When the server is turned on, air is flowing from the fan grille. If there is no
airflow, the fan is not working. This can cause the server to overheat and shut
down.
2. Check the system-error log or IMM2.1 event log. See
Action
1. Make sure that:
• The keyboard cable is securely connected.
• The server and the monitor are turned on.
2. Run the Setup Utility and enable the USB device option.
3. If the keyboard t is connected to a USB hub, disconnect the keyboard from the
hub and connect it directly to the server.
4. Replace the keyboard.
1. Make sure that:
• The mouse or USB device cable is securely connected to the server.
• The mouse or USB device drivers are installed correctly.
• The server and the monitor are turned on.
• The mouse option is enabled in the Setup Utility.
2. If you are using a USB mouse or USB device and it is connected to a USB hub,
disconnect the mouse or USB device from the hub and connect it directly to the
server.
3. Replace the mouse or USB device.
"Event logs" on page 54.
.
Chapter 5 Troubleshooting
63