HP EliteBook 840 G1 Notebook PC - Manual (Page 62)

2. Replace the 4 screws (2) to secure the hard drive.
3. Replace the battery (see Inserting or removing the battery on page 38 ) and the service door (see
Removing or replacing the service door on page 49 ).
4. Turn the computer right-side up, and then reconnect AC power and external devices to the
computer.
5. Turn on the computer.
Adding or replacing memory
Adding or replacing memory modules
The computer has two memory module slots. The capacity of the computer can be upgraded by
adding a memory module to the vacant expansion memory module slot or by upgrading the existing
memory module in the primary memory module slot.
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 identical.
To add or replace a memory module:
52 Chapter 8 Drives