4. Insert a fully charged battery until it clicks into place.

5. Slide the battery latch to the locked position.

6. Turn the computer over again. Connect the ac power adapter and all cables.

Replacing a memory module

Before you start, print these instructions.

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 three (DDR3) synchronous dynamic random access memory (SDRAM) unbuffered small outline dual inline memory module (SO-DIMM), available as an option, in the memory slot of the computer.

When installing or replacing the memory module, be sure to follow the precautions.

Note: The operating speed of the memory module has dependency on the system configuration.

Attention: Before you start installing a memory 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 memory module.

To replace a memory module, do the following:

1.Turn off the computer; then disconnect the ac power adapter and all cables from the computer.

2.Close the computer display, and turn it over.

Chapter 6. Replacing devices 69

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Lenovo 23539KU manual Replacing a memory module