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Read all caution and danger statements before performing any instructions.
Rules for ensuring general safety during maintenance and operation.
Precautions for working with electrical components and avoiding shock.
Checklist to identify potentially unsafe conditions on products.
Procedures for protecting sensitive components from electrostatic discharge.
Importance of proper electrical grounding for safety and system function.
General warnings and cautions related to safety.
Lists physical and environmental specifications for the computer.
Steps to access and launch the Lenovo BIOS Setup Utility.
How to navigate and modify system configuration options in the BIOS.
Setting and managing Administrator and Power-On passwords for security.
Options to control user access to specific hardware devices via BIOS.
Procedures for choosing the boot sequence or temporary startup device.
How to save or discard changes and exit the BIOS setup.
Common causes and solutions for boot failures related to the hard drive.
Troubleshooting steps for issues related to the computer's power supply.
Explanations and actions for Power-On Self-Test error messages.
Troubleshooting steps for issues not identified by specific error codes.
Identification of ports and controls on the front of the computer.
Identification of ports and connectors on the rear of the computer.
Illustration and list of major internal computer components.
Detailed layout and identification of connectors on the motherboard.
Essential steps to take before disassembling the computer.
Procedures for safely removing the computer's outer casing.
Guide for swapping out the computer's power supply unit.
Steps for replacing M.2 and 3.5-inch storage drives.
Instructions for removing and installing a graphics card.
Procedure for replacing RAM modules.
Steps for removing and installing the CPU.
Step-by-step instructions for replacing the system board.
List of Field Replaceable Units (FRUs) for the Y520T-IKL model.
List of Field Replaceable Units (FRUs) for the Y520T-25ICZ model.
Supplementary information for service representatives.
Information on reducing power consumption of computer components.
Details on Advanced Configuration and Power Interface BIOS system.
How to enable and disable features for automatic computer startup.
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