HP ProBook 4545s HP Notebook User Guide - Linux - Page 67

Memory modules - memory upgrade

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9 Memory modules The computer has one memory module compartment. 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 replace a memory module: CAUTION: To prevent information loss or an unresponsive system: Shut down the computer before adding or replacing memory modules. Do not remove a memory module while the computer is on, in the Suspend state, or in Hibernation. 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. 1. Save your work and shut down the computer. 2. Disconnect AC power and external devices connected to the computer. 3. Turn the computer upside down on a flat surface. 4. Remove the battery (see Inserting or removing the battery on page 37). 5. Remove the security screw, if using (see Using the optional security screw on page 44). 6. Remove the service door (see Removing or replacing the service door on page 45). 7. If you are replacing a memory module, remove the existing memory module: a. Pull away the retention clips (1) on each side of the memory module. The memory module tilts up. 57

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9
Memory modules
The computer has one memory module compartment. 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 replace a memory module:
CAUTION:
To prevent information loss or an unresponsive system:
Shut down the computer before adding or replacing memory modules. Do not remove a memory
module while the computer is on, in the Suspend state, or in Hibernation.
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.
1.
Save your work and shut down the computer.
2.
Disconnect AC power and external devices connected to the computer.
3.
Turn the computer upside down on a flat surface.
4.
Remove the battery (see
Inserting or removing the battery
on page
37
).
5.
Remove the security screw, if using (see
Using the optional security screw
on page
44
).
6.
Remove the service door (see
Removing or replacing the service door
on page
45
).
7.
If you are replacing a memory module, remove the existing memory module:
a.
Pull away the retention clips
(1)
on each side of the memory module.
The memory module tilts up.
57