Lenovo ThinkCentre M72z, Hardware Maintenance Manual, Page: 5 / 126

Contents
Chapter 1. About this manual . . . . . . 1
Important Safety Information . . . . . . . . . . 1
Chapter 2. Safety information . . . . . . 3
General safety . . . . . . . . . . . . . . . . 3
Electrical safety . . . . . . . . . . . . . . . 3
Safety inspection guide . . . . . . . . . . . . 5
Handling electrostatic discharge-sensitive
devices
. . . . . . . . . . . . . . . . . . 5
Grounding requirements . . . . . . . . . . . . 6
Safety notices (multi-lingual translations) . . . . . 6
Chapter 3. General information . . . . 29
Specifications . . . . . . . . . . . . . . . 29
Lenovo ThinkVantage Tools . . . . . . . . . 29
Lenovo Welcome. . . . . . . . . . . . . . 30
Lenovo Solution Center . . . . . . . . . . . 30
SimpleTap . . . . . . . . . . . . . . . . 30
Additional information resources . . . . . . . 31
Chapter 4. General Checkout . . . . . 33
Problem determination tips . . . . . . . . . . 33
Chapter 5. Troubleshooting and
diagnostics . . . . . . . . . . . . . .
35
Basic troubleshooting . . . . . . . . . . . . 35
Troubleshooting procedure . . . . . . . . . . 36
Troubleshooting . . . . . . . . . . . . . . 37
Audio problems . . . . . . . . . . . . 37
CD problems . . . . . . . . . . . . . 38
DVD problems . . . . . . . . . . . . . 39
Intermittent problems . . . . . . . . . . 41
Keyboard, mouse, or pointing device
problems . . . . . . . . . . . . . . .
41
Monitor problems. . . . . . . . . . . . 43
Networking problems . . . . . . . . . . 44
Option problems . . . . . . . . . . . . 47
Performance and lockup problems . . . . . 48
Printer problems . . . . . . . . . . . . 49
Serial port problems. . . . . . . . . . . 49
Software problems . . . . . . . . . . . 50
USB problems . . . . . . . . . . . . . 51
Diagnostics . . . . . . . . . . . . . . . . 51
Lenovo Solution Center . . . . . . . . . 51
Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . .
53
Starting the Setup Utility program . . . . . . . 53
Viewing and changing settings . . . . . . . . 53
Using passwords. . . . . . . . . . . . . . 53
Password considerations . . . . . . . . . 54
Power-On Password . . . . . . . . . . 54
Administrator Password . . . . . . . . . 54
Hard Disk Password. . . . . . . . . . . 54
Setting, changing, and deleting a password . 54
Enabling or disabling a device . . . . . . . . 55
Selecting a startup device . . . . . . . . . . 55
Selecting a temporary startup device . . . . 55
Selecting or changing the startup device
sequence . . . . . . . . . . . . . . .
55
Exiting the Setup Utility program . . . . . . . 56
Chapter 7. Symptom-to-FRU Index . . 57
Hard disk drive boot error . . . . . . . . . . 57
Power Supply Problems . . . . . . . . . . . 57
Beep symptoms . . . . . . . . . . . . . . 57
POST error codes . . . . . . . . . . . . . 58
Miscellaneous error conditions . . . . . . . . 59
Undetermined problems . . . . . . . . . . . 60
Chapter 8. Locations . . . . . . . . . 63
Locating connectors, controls, and indicators on
the front of your computer . . . . . . . . . .
63
Locating connectors on the rear of your
computer . . . . . . . . . . . . . . . . .
64
Locating major FRUs and CRUs . . . . . . . . 66
Looking up FRU information . . . . . . . . . 69
System board parts and connectors . . . . . . 70
Chapter 9. Replacing FRUs . . . . . . 71
Removing and reinstalling the system stand hinge
cover . . . . . . . . . . . . . . . . . .
71
Removing and reinstalling the system stand . . . 73
Removing and reinstalling the monitor stand . . . 75
Removing and reinstalling the frame stand. . . . 76
Removing the computer cover . . . . . . . . 79
Replacing the hard disk drive . . . . . . . . . 79
Replacing the optical drive . . . . . . . . . . 82
Removing the VESA mount bracket . . . . . . 83
Replacing the rear I/O assembly . . . . . . . . 84
Removing and reinstalling the system board
shield . . . . . . . . . . . . . . . . . .
86
Replacing the power supply . . . . . . . . . 87
Replacing the microprocessor fan . . . . . . . 88
Replacing the heat sink assembly . . . . . . . 89
Replacing the microprocessor . . . . . . . . 91
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