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Chapter 7. Troubleshooting and diagnostics
This chapter describes some basic troubleshooting and diagnostic programs. If your
computer problem is not described here, see Chapter 9, “Getting information, help,
and service,” on page 39 for additional troubleshooting resources.
Basic troubleshooting
The following table provides information to help you troubleshoot your computer
problem.
Symptom Action
The computer does not start
when you press the power
button.
Verify that:
v The power cord is plugged into the rear of the computer and into a working
electrical outlet.
v If your computer has a secondary power switch on the back of the computer,
make sure that it is switched on.
v The power indicator on the front of the computer is on.
v The voltage is set to the correct setting for your country.
If
you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
The monitor screen is blank. Verify that:
v The monitor cable is securely attached to the rear of the monitor and to the
rear of the computer.
v The monitor power cord is plugged into the monitor and into a working
electrical outlet.
v The monitor is turned on and the brightness and contrast controls are set
correctly.
v The voltage is set to the correct setting for your country.
v The monitor signal cable is securely connected to the monitor and to the
monitor connector on the computer.
Note:
If your computer has two monitor connectors, verify that your monitor is
connected to the option connector rather than the one in the rear of the system
board. For more information, see “Connecting your computer” on page 5.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
The keyboard does not work.
The computer does not respond
to the keyboard.
Verify that:
v The computer is turned on.
v The monitor is turned on and the brightness and contrast controls are set
correctly.
v The keyboard is securely connected to the keyboard connector on the
computer.
v No keys are stuck.
If
you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
© Copyright Lenovo 2008 25
- ThinkCentre 1
- User Guide 1
- User Guide 3
- Contents 5
- Introduction 7
- © Copyright Lenovo 2008 1 9
- 2 User Guide 10
- Comfort 11
- Glare and lighting 11
- Air circulation 12
- Connecting your computer 13
- 6 User Guide 14
- 8 User Guide 16
- Turning on computer power 18
- Completing important tasks 19
- 12 User Guide 20
- Features 21
- 14 User Guide 22
- Specifications 23
- 16 User Guide 24
- 18 User Guide 26
- Using passwords 27
- Password considerations 27
- User Password 28
- Administrator Password 28
- Advanced settings 30
- Using system programs 31
- 24 User Guide 32
- Basic troubleshooting 33
- Diagnostic programs 34
- PC-Doctor for Windows 35
- PC-Doctor for DOS 35
- PC-Doctor for Windows PE 36
- Cleaning the mouse 37
- Optical mouse 37
- Non-optical mouse 37
- 30 User Guide 38
- 32 User Guide 40
- 34 User Guide 42
- 36 User Guide 44
- Solving recovery problems 45
- 38 User Guide 46
- Information resources 47
- Online Books folder 47
- Lenovo Care 47
- Access Help 48
- Safety and Warranty 48
- Help and service 49
- Calling for service 49
- Using other services 50
- Basic AT commands 51
- 44 User Guide 52
- Extended AT commands 53
- 46 User Guide 54
- Fax Class 1 commands 55
- Fax Class 2 commands 55
- Voice commands 56
- 50 User Guide 58
- Appendix B. Notices 59
- Television output notice 60
- Trademarks 60
- 54 User Guide 62
- 56 User Guide 64
- Part Number: 53Y7512 66
- Printed in USA 66
- (1P) P/N: 53Y7512 66
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