Computer Hardware User Manual

ManualsBrandsLenovo ManualsComputer HardwareTHINKCENTRE 9421

Table Of Contents

Chapter 1. About this manual
- Important Safety Information
- Important information about replacing RoHS compliant FRUs
Chapter 2. Safety information
- General safety
- Electrical safety
- Voltage-selection switch
- Safety inspection guide
- Handling electrostatic discharge-sensitive devices
- Grounding requirements
- Safety notices (multi-lingual translations)
Chapter 3. General information
- The ThinkVantage Productivity Center program
- Additional information resources
- Specifications
  - For machine types: 7057, 7062, 7092, 9342, 9344, 9354, 9426, 948
  - For machine types: 7061, 7090, 9353, 9421, 9485, 9623, 9625, 970
Chapter 4. General Checkout
- Problem determination tips
Chapter 5. Diagnostics
- Lenovo System Toolbox
- PC-Doctor for Windows PE
  - Running diagnostics from the Rescue and Recovery workspace
- PC-Doctor for DOS
Chapter 6. Using the Setup Utility
- Starting the Setup Utility program
- Viewing and changing settings
- Using passwords
- Enabling or disabling a device
- Selecting a startup device
  - Selecting a temporary startup device
  - Selecting or changing the startup device sequence
- Exiting from the Setup Utility program
Chapter 7. Symptom-to-FRU Index
- Hard disk drive boot error
- Power Supply Problems
- Diagnostic error codes
- Beep symptoms
- POST error codes
- Miscellaneous error messages
- Undetermined problems
Chapter 8. Replacing FRUs (Types 7061, 7090, 9353, 9421, 9485, 9
- Locating controls and connectors on the front of your computer
- Rear connectors
- Removing the cover
- Locations
- Locating parts on the system board
- Removing and replacing the front bezel
- Replacing the power supply
- Replacing the system board
- Replacing the microprocessor
- Replacing a memory module
- Replacing a PCI adapter card
- Replacing the hard disk drive
- Replacing an optical drive
- Replacing the diskette drive
- Replacing the rear fan assembly
- Replacing the front fan assembly
- Replacing the front audio/USB assembly
- Replacing the power switch/LED assembly
- Replacing the CMOS battery
- Completing the FRU replacement
Chapter 9. Replacing FRUs (Types 7057, 7062, 7092, 9342, 9344, 9
- Rear connectors
- Removing the cover
- Locations
- Locating parts on the system board
- Accessing system board components and drives
- Replacing a memory module
- Replacing the CMOS battery
- Replacing the power supply
- Replacing the system board
- Replacing the microprocessor
- Replacing the hard disk drive
- Replacing an optical drive
- Replacing the diskette drive
- Replacing the power switch/LED assembly
- Replacing the front panel card
- Replacing the system fan assembly
- Replacing a PCI adapter card
- Completing the FRU replacement
Chapter 10. FRU lists
- Machine Type 3656
- Machine Type 3658
- Machine Type 7057
- Machine Type 7061
- Machine Type 7062
- Machine Type 7090
- Machine Type 7092
- Machine Type 9342
- Machine Type 9344
- Machine Type 9353
- Machine Type 9354
- Machine Type 9421
- Machine Type 9426
- Machine Type 9485
- Machine Type 9486
- Machine Type 9623
- Machine Type 9624
- Machine Type 9625
- Machine Type 9705
- Machine Type 9707
- Machine Type 9795
- Machine Type 9804
- Machine Type 9935
- Machine Type 9945
- Machine Type 9946
- Machine Type 9953
Chapter 11. Additional Service Information
- Security features
- BIOS levels
- Flash update procedures
  - Updating (flashing) BIOS from a diskette
- Recovering from a POST/BIOS update failure
- Power management
  - Automatic configuration and power interface (ACPI) BIOS
  - Automatic Power-On features
Appendix A. Notices
- Television output notice
- Trademarks
Chapter 1. About this manual
- Important Safety Information
- Important information about replacing RoHS compliant FRUs
Chapter 2. Safety information
- General safety
- Electrical safety
- Voltage-selection switch
- Safety inspection guide
- Handling electrostatic discharge-sensitive devices
- Grounding requirements
- Safety notices (multi-lingual translations)
Chapter 3. General information
- The ThinkVantage Productivity Center program
- Additional information resources
- Specifications
  - For machine types: 7057, 7062, 7092, 9342, 9344, 9354, 9426, 948
  - For machine types: 7061, 7090, 9353, 9421, 9485, 9623, 9625, 970
Chapter 4. General Checkout
- Problem determination tips
Chapter 5. Diagnostics
- Lenovo System Toolbox
- PC-Doctor for Windows PE
  - Running diagnostics from the Rescue and Recovery workspace
- PC-Doctor for DOS
Chapter 6. Using the Setup Utility
- Starting the Setup Utility program
- Viewing and changing settings
- Using passwords
- Enabling or disabling a device
- Selecting a startup device
  - Selecting a temporary startup device
  - Selecting or changing the startup device sequence
- Exiting from the Setup Utility program
Chapter 7. Symptom-to-FRU Index
- Hard disk drive boot error
- Power Supply Problems
- Diagnostic error codes
- Beep symptoms
- POST error codes
- Miscellaneous error messages
- Undetermined problems
Chapter 8. Replacing FRUs (Types 7061, 7090, 9353, 9421, 9485, 9
- Locating controls and connectors on the front of your computer
- Rear connectors
- Removing the cover
- Locations
- Locating parts on the system board
- Removing and replacing the front bezel
- Replacing the power supply
- Replacing the system board
- Replacing the microprocessor
- Replacing a memory module
- Replacing a PCI adapter card
- Replacing the hard disk drive
- Replacing an optical drive
- Replacing the diskette drive
- Replacing the rear fan assembly
- Replacing the front fan assembly
- Replacing the front audio/USB assembly
- Replacing the power switch/LED assembly
- Replacing the CMOS battery
- Completing the FRU replacement
Chapter 9. Replacing FRUs (Types 7057, 7062, 7092, 9342, 9344, 9
- Rear connectors
- Removing the cover
- Locations
- Locating parts on the system board
- Accessing system board components and drives
- Replacing a memory module
- Replacing the CMOS battery
- Replacing the power supply
- Replacing the system board
- Replacing the microprocessor
- Replacing the hard disk drive
- Replacing an optical drive
- Replacing the diskette drive
- Replacing the power switch/LED assembly
- Replacing the front panel card
- Replacing the system fan assembly
- Replacing a PCI adapter card
- Completing the FRU replacement
Chapter 10. FRU lists
- Machine Type 3656
- Machine Type 3658
- Machine Type 7057
- Machine Type 7061
- Machine Type 7062
- Machine Type 7090
- Machine Type 7092
- Machine Type 9342
- Machine Type 9344
- Machine Type 9353
- Machine Type 9354
- Machine Type 9421
- Machine Type 9426
- Machine Type 9485
- Machine Type 9486
- Machine Type 9623
- Machine Type 9624
- Machine Type 9625
- Machine Type 9705
- Machine Type 9707
- Machine Type 9795
- Machine Type 9804
- Machine Type 9935
- Machine Type 9945
- Machine Type 9946
- Machine Type 9953
Chapter 11. Additional Service Information
- Security features
- BIOS levels
- Flash update procedures
  - Updating (flashing) BIOS from a diskette
- Recovering from a POST/BIOS update failure
- Power management
  - Automatic configuration and power interface (ACPI) BIOS
  - Automatic Power-On features
Appendix A. Notices
- Television output notice
- Trademarks

Microprocessorfanandheatsink

PCIadapterconnector

Memorymodules

PCIExpressx1adapterconnector

Battery

Coverpresence(Intrusion)switch

PCIExpressx16graphicsadapter

connector

Rearfanassembly

70ThinkCentreHardwareMaintenanceManual