VAIO® S Series Laptop

Model # VPCSB4DFX  |   change model...
This model is also known as:
PCG4121GL, VPCSB4DFX/B, VPCSB4DFX/L, VPCSB4DFXB, VPCSB4DFXL,

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