Lenovo 646001U Troubleshooting Guide - Page 47

Replacing memory

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11. Reinstall the screw. For 14.1-inch widescreen models: Upgrading the hard disk drive For 14.1-inch screen and 15.4-inch widescreen models: 12. Reinstall the battery. 13. Turn the computer over again. Connect the ac adapter and the cables to the computer. Replacing memory Important Read Safety and Warranty Guide before replacing memory. Increasing memory capacity is an effective way to make programs run faster. You can increase the amount of memory in your computer by installing a double data rate (DDR) 2 synchronous dynamic random access memory (DRAM) unbuffered small outline dual inline memory module (SO-DIMM), available as an option, in the memory slot of your computer. SO-DIMMs with different capacities are available. Note: Use only the memory types supported by your computer. If you incorrectly install the optional memory or install an unsupported memory type, a warning beep will sound when you try to start the computer. To install an SO-DIMM, do the following: 1. Touch a metal table or a grounded metal object. This action reduces any static electricity in your body, which could damage the SO-DIMM. Do not touch the contact edge of the SO-DIMM. 2. Turn off the computer; then disconnect the ac adapter and all cables from the computer. Chapter 5. Upgrading and replacing devices 37

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11.
Reinstall the screw.
For 14.1-inch widescreen models:
For 14.1-inch screen and 15.4-inch
widescreen models:
12.
Reinstall the battery.
13.
Turn the computer over again. Connect the ac adapter and the cables to
the computer.
Replacing memory
Important
Read
Safety and Warranty Guide
before replacing memory.
Increasing memory capacity is an effective way to make programs run faster.
You can increase the amount of memory in your computer by installing a
double data rate (DDR) 2 synchronous dynamic random access memory
(DRAM) unbuffered small outline dual inline memory module (SO-DIMM),
available as an option, in the memory slot of your computer. SO-DIMMs with
different capacities are available.
Note:
Use only the memory types supported by your computer. If you
incorrectly install the optional memory or install an unsupported
memory type, a warning beep will sound when you try to start the
computer.
To install an SO-DIMM, do the following:
1.
Touch a metal table or a grounded metal object. This action reduces any
static electricity in your body, which could damage the SO-DIMM. Do
not touch the contact edge of the SO-DIMM.
2.
Turn off the computer
; then disconnect the ac adapter and all cables
from the computer.
Upgrading the hard disk drive
Chapter 5. Upgrading and replacing devices
37