Removing and installing c o mponents
during servicing
Removing and installing m em ory
modules
MainmemoryMemoryexpansionMemoryupgradeS yst emexpansion
The no tebook will not start without memory modules, as no fixed RAM is installed.
Your note book supports dual channel DDR 3 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 re duces the performance of y our not ebook.
With a memory configuration of 4 GBytes, the visible and usable main memory
may be reduced to 3 GBytes (depen ding on no tebook con figuration).
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 provided in the "Important notes" chapter.
The notebook must be switched off when installing/removing the memory
modules, it must not be in Suspend mode.
Only use approved memory expansion m od ules in your notebook
(see Section "
Te chnical data", Page 31).
Never use force when installing or removing memory modules.
Make sure that foreign objects do not fall into the memory expansion compart m ent.
Individual components (e.g. th
e processor heat sink) can become very hot
during operation. Therefore,
we recommend that you wait one h our 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 e xposed, please observe the section "
Notes
on installing and removing boa
rds and components", Page 24.
► Switch your notebook off and unplug the mains adapter from the mains o utlet.
► 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, flat a nd clean surface. If necessary, lay
an anti-slip cloth on this surface to prevent the notebook from being scratched.
► Remove the batter y (see "
Removing the battery", Page 17).
A26391-K274-Z220-1-7919, edition 1 25
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