Sony VGX-XL2 User Guide (Computer Component) User Manual page 52

Make sure that
memory capacity is correct, memory installation is complete. If the memory
capacity has not increased, remove the memory module after turning off the
power to this device, and repeat the procedure to properly install the memory
module again.
Remove Memory Module
Discharge static in your body by touching the metal inside this device, and
then press out and down on the clips on both of the memory slots. Carefully
lift the memory module out of the slot.
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System Memory displays the correct memory capacity. If the
Press out and
down.
VGX-XL2A Digital Living System