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Lenovo ThinkCentre A70z Hardware Maintenance Manual for ThinkCentre A70z - Page 110

Installing a power supply assembly

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10. Lift the power supply assembly and the cable out of the computer. Installing a power supply assembly To install a power supply assembly, do the following: 1. Install the new power supply assembly in the main bracket so that the screw holes in the power supply assembly align with the mounting studs in the main bracket. 2. Install and tighten the three screws to secure the power supply assembly to the main bracket. 104 ThinkCentre Hardware Maintenance Manual

Section	Page
Chapter 1. About this manual	7
Important Safety Information	7
Important information about replacing RoHS compliant FRUs	7
Chapter 2. Safety information	9
General safety	9
Electrical safety	9
Safety inspection guide	11
Handling electrostatic discharge-sensitive devices	11
Grounding requirements	12
Safety notices (multi-lingual translations)	12
Chapter 3. General information	35
Lenovo ThinkVantage Tools	35
ThinkVantage Productivity Center	35
Lenovo Solution Center	35
SimpleTap	35
Additional information resources	35
Specifications	36
Chapter 4. General Checkout	37
Problem determination tips	37
Chapter 5. Diagnostics	39
Lenovo ThinkVantage Toolbox	39
Lenovo System Toolbox	39
Lenovo Solution Center	40
PC-Doctor for DOS	40
Creating a diagnostic disc	40
Running the diagnostic program from a diagnostic disc	40
Navigating through the diagnostics programs	41
Running tests	41
Viewing the test log	42
Chapter 6. Using the Setup Utility	43
Starting the Setup Utility program	43
Viewing and changing settings	43
Using passwords	43
Password considerations	43
Set User Password	44
Set Administrator Password	44
Setting, changing, and deleting a password	44
Enabling or disabling a device	44
Selecting a startup device	45
Selecting a temporary startup device	45
Selecting or changing the startup device sequence	45
Exiting from the Setup Utility program	45
Chapter 7. Symptom-to-FRU Index	47
Hard disk drive boot error	47
Power Supply Problems	47
Diagnostic error codes	48
Beep symptoms	65
POST error codes	66
Miscellaneous error messages	67
Undetermined problems	69
Chapter 8. Replacing FRUs	71
Locating controls and connectors on the front of your computer	71
Rear connectors	71
FRU locations	72
Major components of the computer	73
System board connectors	74
Adjusting the computer stand	75
Removing the computer stand	75
Removing the computer cover	76
Opening and closing the system board shielding	77
Opening the system board shielding	77
Closing the system board shielding	78
Replacing the rear I/O shielding	79
Removing the rear I/O shielding	79
Installing the rear I/O shielding	80
Replacing the hard disk drive	80
Removing the hard disk drive	81
Installing a hard disk drive	81
Replacing the optical drive	83
Removing the optical drive	83
Installing an optical drive	84
Replacing the memory module	85
Removing the memory module	85
Installing a memory module	86
Replacing the microprocessor fan assembly	87
Removing the microprocessor fan assembly	87
Installing a microprocessor fan assembly	89
Replacing the microprocessor and heat sink assembly	91
Removing the microprocessor and heat sink assembly	91
Installing the microprocessor and heat sink assembly	93
Replacing the system board	94
Removing the system board	94
Installing a system board	95
Replacing the internal speakers	96
Removing the internal speakers	96
Installing internal speakers	97
Replacing the rear I/O assembly	97
Removing the rear I/O assembly	98
Installing a rear I/O assembly	99
Replacing the integrated webcam	100
Removing the integrated webcam	100
Installing an integrated webcam	101
Replacing the inverter	103
Removing the inverter	103
Installing an inverter	104
Replacing the battery	105
Removing the battery	105
Installing a battery	106
Replacing the system fan	106
Removing the system fan	106
Installing a system fan	107
Replacing the power supply assembly	107
Removing the power supply assembly	108
Installing a power supply assembly	110
Replacing the LCD panel	112
Removing the LCD panel	112
Installing an LCD panel	113
Installing a computer wall mount	114
Completing the FRU installation	114
Installing a computer cover	114
Installing a computer stand	115
Chapter 9. FRU lists	117
Overall: MT 1165, 1184, and 1186	117
Mechanical FRUs	121
Keyboard and Mouse	122
Adapters and miscellaneous FRUs	131
Power Cords	132
Recovery discs	136
XP Professional Recovery CD	136
Windows 7 Home Basic 32 Recovery CD	137
Windows 7 Home Premium 32 Recovery CD	137
Windows 7 Professional 32 Recovery CD	139
Windows 7 Professional 64 Recovery CD	140
Overall: MT 0401, 0421, 0994, and 2565	141
Mechanical FRUs	150
Keyboard and Mouse	152
Adapters and miscellaneous FRUs	163
Power Cords	163
Recovery discs	169
Windows 7 Home Basic 32 Recovery CD	169
Windows 7 Home Basic 32 SP1 Recovery CD	169
Windows 7 Home Premium 32 Recovery CD	170
Windows 7 Home Premium 32 SP1 Recovery CD	171
Windows 7 Professional 32 Recovery CD	173
Windows 7 Professional 32 SP1 Recovery CD	176
Windows 7 Professional 64 Recovery CD	178
Windows 7 Professional 64 SP1 Recovery CD	181
Windows XP Professional 32 Recovery CD	183
Windows 7 Ultimate 32 Recovery CD	184
Windows 7 Ultimate Starter 32 Recovery CD	184
Chapter 10. Additional Service Information	185
Security features	185
Hardware controlled Passwords	185
Operating system password	185
Vital product data	185
BIOS levels	185
Flash update procedures	185
Updating (flashing) BIOS from a disc	186
Updating (flashing) BIOS from your operating system	186
Recovering from a POST/BIOS update failure	186
Power management	187
Automatic configuration and power interface (ACPI) BIOS	187
Automatic Power-On features	187
Appendix A. Notices	189
Television output notice	190
Trademarks	190