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Removing and installing com p onents
during servicing
Removing and installing memory
modules
MainmemoryMemoryexpansionMemoryupgradeSystemexpansion
The no tebook will not start without memory modules, as no xed RAM is installed.
Your notebook supports dual channel DDR3 technology.
The dual channel DDR3 technology can on ly be used with two identical memory
modules. When two different memory modules are installed, only "single channel"
mode is supported. This reduces the performance of your notebook.
With a memory c onguration of 4 GBytes, the visible and usable main memory
may be reduced to 3 GBytes (depending on no tebook conguration).
If you are asked by the Hotline/Help Desk to remove and install the memory
modules yourself, proceed as follows:
Pay attention to the relevant safety notes p rovided in the "Important notes" chapter.
The notebook must be switched off when installing/removing the memory
modules, it must not b e in Suspend mode.
Only use ap proved memory expansion modules in your notebook
(see Section "
Technical data", Pa ge 31).
Never use force when installing or remo ving memory modules.
Make sure that foreign objects do not fall into the memory expansion compartment.
Individual components (e.g. th
e processor heat sink) can become very hot
during operation. Therefore,
we recommend that you wait one hour after
switching off the notebook bef
ore removing or installing the memory modules.
Otherwise, there is a risk of su
ffering burns!
As some non-ESD safe component
s are exposed, please observe the section "
Notes
on installing a nd remov ing boa
rds and components", Page 24.
Switch your notebook off and unplug the mains adapter from the mains outlet.
Close the LCD screen so that it locks into place.
Disconnect all cables connected to the notebook.
Turn your notebook over and place it on a stable, at and clean surface. If necessary, lay
an anti-slip cloth on this surface to prevent th e notebook from being scratched.
Remove the battery (see "
Removing the b attery", Page 17).
A26391-K274-Z220-1-7919 , edition 1 25
33


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