Help withh sony vaio laptop please?

Well i ordered a silver SONY VAIO EE Series VPCEE42FX/WI Notebook AMD Athlon II Dual-Core P360(2.30GHz) 15.5" 4GB Memory DDR3 1066 500GB HDD and i cant see nothing on the screen only if i go very close to it everything is very dim how do i adjust the brightness? Please help.

SONY VAIO EE Series VPCEE42FX/BJ Notebook AMD Athlon II Dual-Core P360(2.30GHz) 15.5" 4GB Memory DDR3 1066 500GB HDD 5400rpm DVD Super Multi ATI Radeon HD 4250

Sony Vaio EA3S1E/B Intel Core i3 370M 2.4GHz 500GB HDD 4GB RAM 14" WXGA TFT Laptop

SONY VAIO EE Series VPCEE47FX/BJ Notebook AMD Phenom II Triple-Core P860(2.0GHz) 15.5" 4GB Memory DDR3 1066 640GB HDD