Lenovo ThinkCentre M90p, Maintenance Manual, Page: 5 / 112

Contents
Chapter 1. About this manual . . . . . . 1
Important safety information . . . . . . . . . . 1
Important information about replacing RoHS
compliant FRUs . . . . . . . . . . . . . . .
1
Chapter 2. Safety information . . . . . . 3
General safety . . . . . . . . . . . . . . . . 3
Electrical safety . . . . . . . . . . . . . . . 3
Voltage-selection switch . . . . . . . . . . . . 5
Safety inspection guide . . . . . . . . . . . . 5
Handling electrostatic discharge-sensitive
devices
. . . . . . . . . . . . . . . . . . 6
Grounding requirements . . . . . . . . . . . . 6
Safety notices (multi-lingual translations) . . . . . 6
Chapter 3. General information . . . . 29
Lenovo ThinkVantage Tools . . . . . . . . . 29
Lenovo Welcome. . . . . . . . . . . . . . 29
Lenovo Solution Center . . . . . . . . . . . 29
SimpleTap . . . . . . . . . . . . . . . . 29
Additional information resources . . . . . . . 29
Specifications . . . . . . . . . . . . . . . 30
For machine type: 7536 . . . . . . . . . 30
Chapter 4. General checkout . . . . . 31
Problem determination tips . . . . . . . . . . 32
Chapter 5. Diagnostics . . . . . . . . 33
Lenovo ThinkVantage Toolbox . . . . . . . . 33
Lenovo Solution Center . . . . . . . . . . . 33
PC-Doctor for Rescue and Recovery . . . . . . 34
PC-Doctor for DOS . . . . . . . . . . . . . 34
Creating a diagnostic disc . . . . . . . . 34
Running the diagnostic program from a
diagnostic disc . . . . . . . . . . . . .
34
Navigating through the diagnostics
programs . . . . . . . . . . . . . . .
35
Running tests . . . . . . . . . . . . . 35
Viewing the test log . . . . . . . . . . . 36
Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . .
39
Starting the Setup Utility program . . . . . . . 39
Viewing and changing settings . . . . . . . . 39
Using passwords. . . . . . . . . . . . . . 39
Password considerations . . . . . . . . . 39
Power-On Password . . . . . . . . . . 40
Administrator Password . . . . . . . . . 40
Hard Disk Password. . . . . . . . . . . 40
Setting, changing, and deleting a password . 40
Enabling or disabling a device . . . . . . . . 40
Selecting a startup device . . . . . . . . . . 41
Selecting a temporary startup device . . . . 41
Selecting or changing the startup device
sequence . . . . . . . . . . . . . . .
41
Exiting from the Setup Utility program . . . . . 41
Chapter 7. Symptom-to-FRU index . . 43
Hard disk drive boot error . . . . . . . . . . 43
Power Supply Problems . . . . . . . . . . . 43
Diagnostic error codes . . . . . . . . . . . 44
Beep symptoms . . . . . . . . . . . . . . 61
POST error codes . . . . . . . . . . . . . 61
Miscellaneous error messages . . . . . . . . 63
Undetermined problems . . . . . . . . . . . 64
Chapter 8. Replacing FRUs (Machine
type: 7536) . . . . . . . . . . . . . .
67
Locating connectors on the front of the computer . 67
Locating connectors on the rear of the computer . 67
Opening the computer cover . . . . . . . . . 68
Locating components . . . . . . . . . . . . 69
Locating parts on the system board . . . . . . 70
Replacing the battery . . . . . . . . . . . . 71
Replacing a memory module . . . . . . . . . 73
Replacing a PCI card . . . . . . . . . . . . 74
Replacing the power supply assembly . . . . . 76
Replacing the heat sink . . . . . . . . . . . 78
Replacing the microprocessor . . . . . . . . 79
Replacing the system board . . . . . . . . . 82
Replacing the hard disk drive . . . . . . . . . 84
Replacing the optical drive . . . . . . . . . . 86
Replacing the internal speaker . . . . . . . . 87
Replacing the front audio and USB assembly . . 90
Replacing the system fan . . . . . . . . . . 91
Completing the parts replacement . . . . . . . 93
Chapter 9. FRU lists . . . . . . . . . . 95
Machine Type 7536 . . . . . . . . . . . . . 95
Chapter 10. Additional service
information . . . . . . . . . . . . . .
97
Security features . . . . . . . . . . . . . . 97
Hardware-controlled passwords . . . . . . 97
Operating system password . . . . . . . 97
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