Removing the cover | Lenovo 8454, 8455, 8453, 8459, 8460, 8457, 8458

Removing the cover

Important

Read “Important safety information” on page v and “Handling static-sensitive devices” on page 6 before removing the computer cover.

To remove the computer cover:

1.Remove any media (diskettes, CDs, or tapes) from the drives, shut down your operating system, and turn off all attached devices.

2.Unplug all power cords from electrical outlets.

3.Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer.

4.Remove the optional floor stand, if attached.

5.Remove any locking devices such as a padlock that secure the cover.

6.Remove the two screws at the rear of the computer cover and slide the cover to the rear to remove.

10User Guide

Image 26

Lenovo 8454, 8455, 8453, 8459, 8460, 8457, 8458, 8456 manual Removing the cover

Contents

User Guide Lenovo 3000 J Series Page Lenovo 3000 J Series Page Contents Iv User Guide Important safety information Conditions that require immediate action General safety guidelines Service Power cords and power adapters Batteries Extension cords and related devicesPlugs and outlets CD and DVD drive safety Heat and product ventilation To connect To disconnect Additional safety informationLithium battery notice Modem safety information Laser compliance statement Power supply statement Overview Information resources Xiv User Guide Installing options Features Connectivity Operating systems, preinstalled varies by model Available options Weight SpecificationsDimensions Environment Handling static-sensitive devices Supported operating positionsTools required Installing external options Locating connectors on the rear of your computer Connector Description Obtaining device drivers Removing the cover Locating components Accessing system board components Identifying parts on the system board User Guide Microprocessor and heat sink 10 Sata IDE connectors Fan connector 11 Clear CMOS/Recovery jumper Installing memory Installing PCI adapters What to do next Security features Padlock Password protectionChanging the battery Erasing a lost or forgotten password clearing Cmos Replacing the cover and connecting the cables Viewing and changing settings Using the Setup UtilityStarting the Setup Utility program Using passwords Administrator or Supervisor Password Selecting a temporary startup device Exiting from the Setup Utility programSelecting a startup device Changing the startup device sequence User Guide System program Updating flashing Bios from a disketteAppendix A. Updating system programs User Guide Cleaning a mouse with a ball Appendix B. Cleaning the mouseCleaning an optical mouse User Guide Appendix C. Manual modem commands Basic AT commands Set Tone Dial as default Low speaker volumeSet Pulse dial as default Internal speaker on until carrier detected Extended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 1 commands Fax Class 2 commands Voice commands Appendix C. Manual modem commands User Guide Appendix D. Notices Television output notice Trademarks Index Page Page Part Number 41T3715