Installing options | Lenovo 8141, 8426, 8421, 8145, 8142, 8420, 8095

1.Remove the computer cover. See “Removing the cover” on page 10.

2.Locate the memory connectors. See “Identifying parts on the system board” on page 11.

v If the two memory connectors closest to the edge of the system board are a yellow color, your system board has DDR type memory. DDR memory modules are 184-pin, 2.5 V and can be used in any combination of 128 MB, 256 MB, 512 MB, and 1 GB sizes.

vIf the two memory connectors closest to the edge of the system board are a green color, your system board has DDR2 type memory. DDR2 memory modules are 240-pin, 1.8 V and can be used in any combination of 256 MB, 512 MB, and 1 GB sizes.

Notes:

a.The type of memory required is also indicated in text near the logo on the system board.

b.System memory as reported in the ″System Summary″ section of the Setup Utility or the operating system might be less than the amount of physical memory installed. This discrepancy is due to memory addressing limitations of the Intel 915G Family chipset, and is usually not visible until more than 3.0 GB of memory is installed.

To install a memory module:

1.Remove the computer cover. See “Removing the cover” on page 10.

2.Pivot the drive bay assembly upward to gain access to the system board.

3.Locate the memory connectors. See “Identifying parts on the system board” on page 11.

4.Open the retaining clips.

Chapter 1. Installing options 13

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Lenovo 8141, 8426, 8421, 8145, 8142, 8420, 8095, 8096 manual Installing options

Contents

User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page Contents Iv User Guide Conditions that require immediate action Important safety information Service General safety guidelines Extension cords and related devices Power cords and power adapters Batteries Plugs and outlets Heat and product ventilation CD and DVD drive safety To connect To disconnect Additional safety informationLithium battery notice Laser compliance statement Modem safety information Power supply statement Information resources Overview Xiv User Guide Features Installing options Memory Operating systems, preinstalled varies by model type Specifications Handling static-sensitive devices Available optionsTools required Installing external options Locating the connectors on the front of your computer Locating the connectors on the rear of your computer Obtaining device drivers Connector Description Removing the cover Identifying parts on the system board Locating components Installing memory Installing options What to do next Installing adapters What to do next Drive specifications Installing internal drives Installing a drive User Guide Connecting the first optical drive Connecting a serial ATA hard disk drive Installing security features Padlock loop Password protectionChanging the battery User Guide Replacing the cover and connecting the cables Erasing a lost or forgotten password clearing Cmos User Guide Starting the Setup Utility program Using the Setup Utility programViewing and changing settings Using passwords Administrator password User passwordIDE Drive User Password IDE Drive Master Password Selecting a startup device Setting, changing, and deleting a passwordUsing Security Profile by Device Changing the startup sequence Exiting from the Setup Utility programSelecting a temporary startup device Updating flashing Bios from your operating system Updating flashing Bios from a disketteAppendix A. Updating system programs System programs Click Continue Click Downloads and drivers Recovering from a POST/BIOS update failure Cleaning a mouse with a ball Appendix B. Cleaning the mouseCleaning an optical mouse User Guide Basic AT commands Appendix C. Manual modem commands Set Pulse dial as default Low speaker volumeSet Tone Dial as default Internal speaker on until carrier detected Extended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 2 commands Fax Class 1 commands Voice commands Appendix C. Manual modem commands User Guide Appendix D. Notices Trademarks Television output notice Index Page Page Part Number 19R0462