Lenovo ThinkStation 4223, User Manual

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Intermittent problems
Symptom: A problem occurs only occasionally and is difficult to repeat.
Actions:
• Verify that all cables and cords are securely connected to the computer and attached devices.
• Verify that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the
fans are working. If airflow is blocked or the fans are not working, the computer might overheat.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 101 for instructions). If you need technical assistance, see Chapter 12 “Getting information, help, and
service” on page 103.
Keyboard, mouse, or pointing device problems
Select your symptom from the following list:
• “All or some keys on the keyboard do not work” on page 92
• “The mouse or pointing device does not work” on page 92
• “The pointer on the screen does not move smoothly with the mouse” on page 93
• “The wireless keyboard does not work” on page 93
All or some keys on the keyboard do not work
Symptom: All or some keys on the keyboard do not work.
Actions:
• Verify that the keyboard cable is securely connected to the correct connector on the computer.
• If you are using an Enhanced Performance USB keyboard and one or more of the Rapid Access buttons
are the only keys that are not working, these buttons might have been disabled or have not been assigned
to a function. Use the help system in the Enhanced Performance Customization Keyboard program to
help diagnose problems with the Rapid Access buttons.
• On the Windows 7 operating system, do the following:
1. Click Start ➙ Control Panel .
2. Click Hardware and Sound .
3. Click Devices and Printers .
4. Double-click USB Enhanced Performance Keyboard . The USB Enhanced Performance Keyboard
Customization program starts.
If these actions do not correct the problem, have the computer and keyboard serviced. See Chapter 12
“Getting information, help, and service” on page 103 for details.
The mouse or pointing device does not work
Symptom: The mouse or pointing device does not work.
Actions:
• Verify that the mouse or pointing-device cable is securely attached to the correct connector on the
computer. Depending on the type of mouse you have, the mouse cable will connect to either the
mouse, serial, or USB connector. Some keyboards have integrated USB connectors that can be used
for a USB mouse or pointing device.
• Verify that the device drivers for the mouse or pointing device are installed correctly.
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ThinkStation User Guide