User Manual
User Manual
User Manual
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Symptom<br />
The operating system does not<br />
start.<br />
The computer beeps multiple<br />
times before the operating<br />
system starts.<br />
Verify that:<br />
Action<br />
• The startup sequence includes the device where the operating system resides.<br />
Usually, the operating system is on the hard disk drive. For more information,<br />
see “Selecting a startup device” on page 47.<br />
Verify that no keys are stuck.<br />
Troubleshooting procedure<br />
Use the following procedure as a starting point for diagnosing problems you are experiencing with your<br />
computer:<br />
1. Verify that the cables for all attached devices are connected correctly and securely.<br />
2. Verify that all attached devices that require ac power are connected to properly grounded, functioning<br />
electrical outlets.<br />
3. Verify that all attached devices are enabled in the BIOS settings of your computer. For more information<br />
about accessing and changing the BIOS settings, refer to your Chapter 7 “Using the Setup Utility<br />
program” on page 45.<br />
4. Go to the “Troubleshooting” on page 58 and follow the instructions for the type of problem you are<br />
experiencing. If the Troubleshooting information does not help you resolve a problem, continue with the<br />
next step.<br />
5. Try using a previously captured configuration to see if a recent change to hardware or software settings<br />
has caused a problem. Before restoring a previous configuration, capture your current configuration in<br />
case the older configuration settings do not solve the problem or have adverse affects. To restore a<br />
captured configuration, do the following:<br />
• For Windows 7: Click Start ➙ Control Panel ➙ System and Security ➙ System ➙ System<br />
Protection ➙ System Restore.<br />
• For Windows 8: Open Control Panel, and then click System and Security ➙ System ➙ System<br />
Protection ➙ System Restore.<br />
If this does not correct the problem, continue with the next step.<br />
6. Run the diagnostic programs. See “Lenovo Solution Center” on page 73 for more information.<br />
• If the diagnostic programs detect a hardware failure, contact the Lenovo Customer Support Center.<br />
See Chapter 11 “Getting information, help, and service” on page 75 for more information.<br />
• If you are unable to run the diagnostic programs, contact the Lenovo Customer Support Center. See<br />
Chapter 11 “Getting information, help, and service” on page 75 for more information.<br />
• If the diagnostic programs do not detect a hardware failure, continue with the next step.<br />
7. Use an antivirus program to see if your computer has been infected by a virus. If the program detects a<br />
virus, remove the virus.<br />
8. If none of these actions solve the problem, seek technical assistance. See Chapter 11 “Getting<br />
information, help, and service” on page 75 for more information.<br />
Troubleshooting<br />
Use the troubleshooting information to find solutions to problems that have definite symptoms.<br />
If the symptom your computer is experiencing occurred immediately after you installed a new hardware<br />
option or new software, do the following before referring to the troubleshooting information:<br />
58 ThinkCentre Edge <strong>User</strong> Guide