User Guide
Page 80
... force the memory module into the slot while aligning the notch on the module with the small projection in the open slot. n 80 N Upgrading Your VAIO Computer 7 Slide the memory module into the memory module slot and push it in until it may cause damage to the slot and the module. 8 Replace.... 9 Connect the AC adapter and the peripheral devices to the computer, and then plug them to the power source. 10 Turn on all peripheral devices and then the computer. Do not touch any other components on the motherboard. If you want to install only one memory module, be sure to use the lower slot.
... force the memory module into the slot while aligning the notch on the module with the small projection in the open slot. n 80 N Upgrading Your VAIO Computer 7 Slide the memory module into the memory module slot and push it in until it may cause damage to the slot and the module. 8 Replace.... 9 Connect the AC adapter and the peripheral devices to the computer, and then plug them to the power source. 10 Turn on all peripheral devices and then the computer. Do not touch any other components on the motherboard. If you want to install only one memory module, be sure to use the lower slot.