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Replacing the system board

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2. Lay the computer on its side. 3. Disconnect the power supply assembly cables from the system board and from all drives. See "System board connectors" on page 68. 4. Remove the four screws at the rear of the chassis that secure the power supply assembly. 5. Lift the power supply assembly out of the chassis. 6. Ensure that the new power supply assembly is the correct replacement. If your power supply assembly has a voltage-selection switch, ensure that you set the voltage-selection switch to match the voltage available at your electrical outlet. If necessary, use a ballpoint pen to slide the switch to a different position. • If the voltage supply range in your local country or region is 100-127 V AC, set the switch to 115 V. • If the voltage supply range in your local country or region is 200-240 V AC, set the switch to 230 V. 7. Install the new power supply assembly into the chassis so that the screw holes in the power supply assembly align with those in the chassis. 8. Install the four screws to secure the power supply. Note: Use only the screws provided by Lenovo. 9. Reconnect the power supply cables to the system board and the drives. 10. Go to "Completing the FRU replacement" on page 95. Replacing the system board CAUTION: The heat sink and microprocessor might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before opening the computer cover. Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy 72 ThinkCentre Hardware Maintenance Manual

Section	Page
Chapter 1. About this manual	7
Important Safety Information	7
Important information about replacing RoHS compliant FRUs	7
Turkish statement of compliance	8
Chapter 2. Safety information	9
General safety	9
Electrical safety	9
Voltage-selection switch	11
Safety inspection guide	11
Handling electrostatic discharge-sensitive devices	12
Grounding requirements	12
Safety notices (multi-lingual translations)	12
Chapter 3. General information	35
The ThinkVantage Productivity Center program	35
Additional information resources	35
Specifications	35
Types 7258, 7260, 7268, 7270, 7280, 7296, 7298, 7304, 7307,7413, 7491, and 7508	36
Types 7259, 7267, 7269, 7279, 7297, 7303, 7306, 7487, 7506, and 7514	36
Chapter 4. General Checkout	39
Problem determination tips	39
Chapter 5. Diagnostics	41
Lenovo System Toolbox	41
PC-Doctor for Windows PE	41
Running diagnostics from the Rescue and Recovery workspace	41
PC-Doctor for DOS	42
Creating a diagnostic CD/DVD image	42
Running diagnostics from the disc	42
Navigating through the diagnostics programs	42
Running tests	42
Viewing the test log	44
Chapter 6. Using the Setup Utility	45
Starting the Setup Utility program	45
Viewing and changing settings	45
Using passwords	45
Password considerations	45
Power-On Password	46
Privileged Access Password	46
Setting, changing, and deleting a password	46
Enabling or disabling a device	46
Selecting a startup device	47
Selecting a temporary startup device	47
Selecting or changing the startup device sequence	47
Advanced settings	47
Exiting from the Setup Utility program	47
Chapter 7. Symptom-to-FRU Index	49
Hard disk drive boot error	49
Power Supply Problems	49
Diagnostic error codes	50
Beep symptoms	67
POST error codes	68
Miscellaneous error messages	69
Undetermined problems	71
Chapter 8. Replacing FRUs (Types 7258, 7260, 7268, 7270, 7280, 7296, 7298, 7304, 7307,7413, 7491, and 7508)	73
Locations	73
Rear connectors	73
Computer components	74
System board connectors	74
Removing the computer cover	75
Removing and installing the front bezel	76
Replacing the power supply assembly	77
Replacing the system board	78
Replacing the heat sink and fan assembly	80
Replacing the microprocessor	81
Replacing a memory module	85
Installing or replacing an adapter card	86
Replacing the primary hard disk drive	88
Replacing the secondary hard disk drive	91
Replacing an optical drive	94
Replacing the diskette drive or card reader	94
Replacing the front fan assembly	96
Replacing the rear fan assembly	97
Replacing the front audio/USB assembly	99
Replacing the power switch/LED assembly	99
Replacing the CMOS battery	100
Replacing the Internal speaker	101
Completing the FRU replacement	101
Chapter 9. Replacing FRUs (Types 7259, 7267, 7269, 7279, 7290, 7297, 7303, 7306, 7408, 7487, 7506 and 7514)	103
Locations	103
Rear connectors	103
Computer components	104
System board connectors	104
Opening the cover	105
Accessing system board components and drives	106
Replacing a memory module	106
Replacing the battery	107
Replacing the power supply	108
Replacing the system board	110
Replacing the microprocessor	113
Replacing the heat sink and fan assembly	115
Replacing the hard disk drive	116
Replacing the optical drive	118
Replacing the internal speaker	120
Replacing the power switch/LED assembly	121
Replacing the card reader	122
Installing or replacing an adapter card	122
Completing the FRU replacement	124
Chapter 10. FRU lists	127
Overall: MT 7258, 7260, 7268, 7270, 7280, 7296, 7298, 7304, 7307,7413, 7491, and 7508	127
Mechanical FRUs	153
Keyboard and Mouse	164
Adapters and miscellaneous FRUs	207
Power Cords	215
Recovery discs	227
Overall: MT 7259, 7267, 7269, 7279, 7297, 7303, 7306, 7487, 7506, and 7514	323
Mechanical FRUs	353
Keyboard and Mouse	365
Adapters and miscellaneous FRUs	407
Power Cords	416
Recovery discs	428
Chapter 11. Additional Service Information	527
Security features	527
Hardware controlled Passwords	527
Operating system password	527
Vital product data	527
BIOS levels	527
Flash update procedures	527
Updating (flashing) BIOS from a disc	528
Updating (flashing) BIOS from your operating system	528
Recovering from a POST/BIOS update failure	528
Power management	529
Automatic configuration and power interface (ACPI) BIOS	529
Automatic Power-On features	529
Appendix A. Notices	531
Television output notice	532
Trademarks	532

Match case Limit results 1 per page

2. Lay the computer on its side.

3. Disconnect the power supply assembly cables from the system board and from all drives. See “System

board connectors” on page 68.

4. Remove the four screws at the rear of the chassis that secure the power supply assembly.

5. Lift the power supply assembly out of the chassis.

6. Ensure that the new power supply assembly is the correct replacement. If your power supply assembly

has a voltage-selection switch, ensure that you set the voltage-selection switch to match the voltage

available at your electrical outlet. If necessary, use a ballpoint pen to slide the switch to a different

position.

•

If the voltage supply range in your local country or region is 100–127 V AC, set the switch to 115 V.

•

If the voltage supply range in your local country or region is 200–240 V AC, set the switch to 230 V.

7. Install the new power supply assembly into the chassis so that the screw holes in the power supply

assembly align with those in the chassis.

8. Install the four screws to secure the power supply.

Note:

Use only the screws provided by Lenovo.

9. Reconnect the power supply cables to the system board and the drives.

10. Go to “Completing the FRU replacement” on page 95.

Replacing the system board

CAUTION:

The heat sink and microprocessor might be very hot. Turn off the computer and wait

three to ﬁve minutes to let the computer cool before opening the computer cover.

Attention

Do not open your computer or attempt any repair before reading and understanding the “Important safety

information” in the

ThinkCentre Safety and Warranty Guide

that came with your computer. To obtain a copy

ThinkCentre Hardware Maintenance Manual