Lenovo ThinkCentre Edge 72z, Hardware Maintenance Manual

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• If the software program used to work correctly, but does not work correctly now, do the following:
On the Windows 7 operating system, click Start ➙ Control Panel ➙ System and Security ➙ System ➙
System Protection ➙ System Restore .
• If you are unable to resolve the problem through other methods, uninstall the software program and
reinstall it.
If these actions do not correct the problem, you might need technical assistance. Contact your software
manufacturer or see “Additional information resources” on page 31 for details.
USB problems
Symptom: The USB connectors cannot be accessed.
Actions:
• Make sure the USB cable is securely connected to the USB connector and to the USB device. If the USB
device has its own power cord, make sure it is attached to a properly grounded electrical outlet.
• If the USB device has its own On/Off switch, make sure it is in the On position.
• If the USB device has an Online switch, make sure it is in the Online position.
• If the USB device is a printer, make sure paper is loaded correctly.
• Make sure any device drivers or other software supplied with the USB device is correctly installed.
Refer to the documentation for the USB device.
• Reset the device by detaching and reattaching the USB connector.
If these actions do not correct the problem, run the diagnostic programs to test the USB connector (see
“Diagnostics” on page 51 for instructions). If the USB device came with its own diagnostics, run those
diagnostics against the USB device. If you need technical assistance, see “Additional information resources”
on page 31.
Diagnostics
The diagnostic program is used to test hardware components of your computer. The diagnostic program can
also report operating-system-controlled settings that interfere with the correct operation of your computer.
You can use the preinstalled diagnostic program to diagnose computer problems, if your computer is
running the Windows operating system.
Notes:
1. Your computer is preinstalled with the Lenovo Solution Center program for diagnostic purposes. For
more information about the Lenovo Solution Center program, see “Lenovo Solution Center” on page 51.
2. If you are unable to isolate and repair the problem yourself after running the diagnostic program, save
and print the log files created by the diagnostic program. You will need the log files when you speak to a
Lenovo technical support representative.
Lenovo Solution Center
The Lenovo Solution Center program enables you to troubleshoot and resolve computer problems. It
combines diagnostic tests, system information collection, security status, and support information, along
with hints and tips for maximum system performance.
Notes:
Chapter 5
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Troubleshooting and diagnostics
51