Removing And Installing Dimms - HP 280 G4 Maintenance And Service Manual

assigned to single channel. If one channel will have more memory than the other, assign the larger
amount to Channel A.
In any mode, the maximum operational speed is determined by the slowest DIMM in the system.
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Removing and installing DIMMs

IMPORTANT:
before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to
the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing
memory modules while voltage is present may cause irreparable damage to the memory modules or system
board.
The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important
to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from
having incompatible metals in contact with each other.
Static electricity can damage the electronic components of the computer or optional cards. Before beginning
these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal
object.
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the
module.
1. Prepare the computer for disassembly
2. Remove the access panel
3. Remove the front bezel
4. Remove the optical drive
5. Remove the drive cage
6. To remove a memory module, open both latches of the memory module socket (1), and then remove the
memory module from the socket (2).
To install memory modules, reverse the removal procedure.
NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab on
the memory socket.
The computer should automatically recognize the additional memory the next time you turn on the computer.
30 Chapter 4 Removal and replacement procedures
You must disconnect the power cord and wait approximately 30 seconds for the power to drain
(Access panel on page
(Front bezel on page
(Optical drive on page
(Hard drive on page
(Preparation for disassembly on page
18).
26).
22).
24).
16).