Sony PCG-K415B User Manual page 168

6 Remove the memory module:
Pull the tabs in the direction of the arrows (1).
The memory module is released.
Make sure that the memory module tilts up and then pull it out in the direction of the arrow (2).
7 Remove the new memory module from its packaging.
8 Install the memory module.
Slide the memory module into the slot.
Push in the memory module until it clicks into place.
!
Do not touch any other components on the motherboard.
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Upgrading your VAIO computer