Table of Contents
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Table of Contents
Related Manuals for Lenovo 245
Summarization of Contents
About This Manual
Important Safety Information
Emphasizes reading all CAUTION and DANGER sections before following instructions.
Safety Information
General Safety
Follow rules for general safety during maintenance.
Electrical Safety
Precautions for working with electrical current to avoid injury.
Safety Inspection Guide
Checklist for identifying potential hazards before servicing.
ESD Handling Precautions
Guidelines for protecting sensitive components from electrostatic discharge.
Grounding Requirements
Ensuring proper electrical grounding for safety and system function.
Safety Notices and Warnings
Key DANGER and CAUTION statements for safe operation.
General Information
Specifications
Details the physical specifications and environmental operating parameters for the computer.
Using the Setup Utility
Starting the BIOS Setup Utility
Instructions on how to launch the BIOS Setup Utility.
Administrator Password
Details on setting, changing, or deleting the Administrator password in BIOS.
Power-On Password
Instructions for setting, changing, or deleting the Power-On password in BIOS.
Enabling/Disabling Devices
How to enable or disable system devices like USB, SATA Mode, Audio, and Ethernet.
Startup Device Selection
Procedures for selecting a temporary or permanent startup device sequence.
Changing Booting Mode
Guide to switch between UEFI and Legacy boot modes for OS installation.
Symptom-to-FRU Index
Hard Disk Drive Boot Errors
Lists symptoms and actions for hard disk drive boot failures.
Power Supply Problems
Troubleshooting steps for power supply related issues.
POST Error Codes
Explanation of Power-On Self-Test (POST) error messages and their resolutions.
Undetermined Problems Troubleshooting
Procedure for diagnosing and isolating problems when symptoms are unclear.
Locating Components and Connectors
Front View
Illustrates controls and components on the front of the computer.
Left and Right View
Shows connectors and components on the sides of the computer.
Rear View
Diagrams the connectors and components located on the rear of the computer.
Hardware Components Overview
Exploded view and list of major internal hardware components.
Motherboard Component Identification
Diagram showing connectors and components on the motherboard.
Replacing Hardware Components
Pre-Disassembly Instructions
Essential steps to take before starting any hardware replacement procedure.
Removing the Rear Cover
Step-by-step guide to safely remove the rear cover of the computer.
Replacing the Hard Disk Drive
Procedure for removing and installing the hard disk drive (HDD).
Replacing the Motherboard
Detailed steps for removing and installing the main system board.
Replacing the Heat-sink
Steps to remove and install the heat-sink module.
Replacing the System Fan
Guide to removing and installing the system cooling fan.
FRU Lists C240-245
Front Bezel
Part number and CRU ID for the front bezel.
Motherboard
Part number and CRU ID for the motherboard.
EMI Shielding
Part number and CRU ID for EMI shielding.
Optical Drive
Part numbers and CRU IDs for optical drives.
Front Indicator Board
Part number and CRU ID for the front indicator board.
Power Switch Board
Part number and CRU ID for the power switch board.
Speaker System
Part number and CRU ID for the speaker system.
Rear Cover
Part numbers and CRU IDs for rear covers.
Camera
Part numbers and CRU IDs for the camera.
Converter Board Bracket
Part number and CRU ID for the converter board bracket.
Converter Board
Part numbers and CRU IDs for converter boards.
Heat-sink Module
Part numbers and CRU IDs for heat-sink modules.
System Fan
Part numbers and CRU IDs for system fans.
Hard Disk Drive
Part numbers and CRU IDs for hard disk drives.
Computer Stand
Part numbers and CRU IDs for computer stands.
FRU Lists C255
Mainboard
Part number and CRU ID for C255 mainboards.
System Fan
Part numbers and CRU IDs for C255 system fans.
Heatsink
Part numbers and CRU IDs for C255 heatsinks.
Speaker
Part number and CRU ID for C255 speakers.
Converter Board
Part numbers and CRU IDs for C255 converter boards.
Function Board
Part number and CRU ID for C255 function boards.
LED Board
Part number and CRU ID for C255 LED boards.
Cables
Part numbers and CRU IDs for various C255 cables.
Antenna
Part number and CRU ID for C255 WLAN antennas.
Converter Bracket
Part number and CRU ID for C255 converter brackets.
Front Bezel
Part numbers and CRU IDs for C255 front bezels.
Computer Stand
Part numbers and CRU IDs for C255 computer stands.
Rear Cover
Part numbers and CRU IDs for C255 rear covers.
Foot
Part numbers and CRU IDs for C255 rubber feet.
EMI Cover
Part number and CRU ID for C255 EMI covers.
RAM
Part numbers and CRU IDs for C255 RAM modules.
ODD
Part numbers and CRU IDs for C255 optical drives.
Panel
Part numbers and CRU IDs for C255 display panels.
Adapter
Part numbers and CRU IDs for C255 adapters.
Wi-Fi Card
Part numbers and CRU IDs for C255 Wi-Fi cards.
Keyboard
Part numbers and CRU IDs for C255 keyboards.
Mouse
Part numbers and CRU IDs for C255 mice.
Power Cord
Part numbers and CRU IDs for C255 power cords.
Additional Service Information
Power Management
Discusses how power management features reduce power consumption.
ACPI BIOS System
Explains the ACPI BIOS system and its control over power management.
Automatic Power-On Features
Details features like Wake Up on Alarm and Wake Up on LAN.
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