HP Compaq Presario CQ42-152TU Notebook PC - Manual (Page 93)

8 Memory modules
The computer has one memory module compartment, which is located on the bottom of the computer.
WARNING! To reduce the risk of electric shock and damage to the equipment, unplug the power cord
and remove all batteries before installing a memory module.
CAUTION: Electrostatic discharge (ESD) can damage electronic components. Before beginning any
procedure, ensure that you are discharged of static electricity by touching a grounded metal object.
NOTE: To use a dual-channel configuration when adding a second memory module, be sure that both
memory modules are the same size.
To add or replace a memory module:
1. Save your work.
2. Shut down the computer and close the display.
If you are not sure whether the computer is off or in Hibernation, turn the computer on by pressing
the power button. Then shut down the computer through the operating system.
3. Disconnect all external devices connected to the computer.
4. Unplug the power cord from the AC outlet.
5. Turn the computer upside down on a flat surface.
6. Remove the battery from the computer.
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