VAIO® F Series Laptop

Model # VPCF23JFX  |   change model...
This model is also known as:
PCG81312L, VPCF23JFX/B, VPCF23JFX/BC, VPCF23JFXB, VPCF23JFXBC,

Serial Number Location: On the bottom, the back panel, or inside the battery compartment of your computer.