IBM THINKPAD R40 - Manual (Page 6)

Installing 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 PC2100 double data rate (DDR) synchronous dynamic random access memory (SDRAM)
unbuffered small outline dual inline memory module (SO-DIMM), available as an option, in the memory slot on the
bottom of the computer. SO-DIMMs with different capacities are available.
Note: Use only a PC2100 DDR SDRAM unbuffered SO-DIMM in your computer. If you install a SO-DIMM that is not supported by
your computer, the computer beeps, and the system does not start. You can purchase the appropriate memory option from your IBM
reseller or IBM marketing representative.
Attention: Before you start installing a module, touch a metal table or a grounded metal object. This action reduces any static
electricity from your body. The static electricity could damage the SO-DIMM.
To install the SO-DIMM, do the following:
1. Turn off the computer; then disconnect the ac adapter and all cables from the
computer.
2. Close the computer display, and turn it over.
3. Remove the battery.
4. Loosen the screw on the memory slot cover; then remove the cover.
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