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Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 116

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6. Remove the fan assembly by releasing the tabs as shown. 7. Install the new fan assembly and connect the fan cables to the system board. 8. Reinstall the plastic fan insert. 9. Reinstall the front bezel. 10. Go to "Completing the FRU replacement" on page 114. 110 Hardware Maintenance Manual

Section	Page
Contents	5
Chapter 1. About this manual	7
Important Safety Information	7
Important information about replacing RoHS compliant FRUs	8
Chapter 2. Safety information	9
General safety	9
Electrical safety	9
Safety inspection guide	11
Handling electrostatic discharge-sensitive devices	12
Grounding requirements	12
Safety notices (multi-lingual translations)	13
Chapter 3. General information	43
The ThinkVantage™ Productivity Center program	43
Additional information resources	43
Specifications	44
Chapter 4. General Checkout	45
Problem determination tips	45
Chapter 5. Diagnostics	47
PC-Doctor for Windows	47
PC-Doctor for DOS	47
Creating a diagnostic CD image	48
Creating diagnostic diskettes	48
Running diagnostics from the CD or diskettes	48
Running diagnostics from the Rescue and Recovery workspace	49
PC-Doctor for Windows PE	49
Running diagnostics from the Rescue and Recovery workspace	49
Navigating through the diagnostics programs	50
Running tests	50
Test results	50
Fixed disk advanced test (FDAT)	51
Quick and Full erase - hard drive	52
Viewing the test log	53
Chapter 6. Using the Setup Utility	55
Starting the Setup Utility program	55
Viewing and changing settings	55
Using passwords	55
Password considerations	55
User Password	56
Administrator Password	56
Setting, changing, and deleting a password	56
Using Security Profile by Device	56
Selecting a startup device	57
Selecting a temporary startup device	57
Changing the startup device sequence	57
Advanced settings	58
Exiting from the Setup Utility program	58
Chapter 7. Symptom-to-FRU Index	59
Hard disk drive boot error	59
Power Supply Problems	59
Diagnostic error codes	60
Beep symptoms	81
POST error codes	82
Miscellaneous error messages	84
Undetermined problems	85
Chapter 8. Replacing FRUs	87
Locating connectors on the rear of your computer	88
Opening the cover	89
Locating FRUs	90
Identifying parts on the system board	91
Replacing a memory module	92
Replacing the power supply assembly	94
Replacing the system board	96
Replacing the microprocessor	101
Replacing a hard disk drive	107
Replacing an optical drive	110
Replacing the diskette drive	111
Replacing a PCI adapter	112
Replacing the fan assembly	114
Replacing the internal speaker	117
Replacing the power button and LED assembly	119
Completing the FRU replacement	120
Updating (flashing) BIOS from a diskette or CD-ROM	121
Chapter 9. FRU lists	123
Machine Type 9300	123
Machine Type 9301	129
Machine Type 9636	134
Machine Type 9638	137
Machine Type 9640	148
Machine Type 9641	153
Machine Type 9642	158
Machine Type 9643	170
Machine Type 9644	176
Machine Type 9645	187
Chapter 10. Additional Service Information	203
Security features	203
Hardware controlled Passwords	203
Operating system password	203
Vital product data	203
BIOS levels	203
Flash update procedures	203
Updating (flashing) BIOS from a diskette	204
Recovering from a POST/BIOS update failure	204
Power management	205
Automatic configuration and power interface (ACPI) BIOS	205
Automatic Power-On features	205
Appendix. Notices	207
Television output notice	208