Computer operations, What should i do if my computer does not start – Sony VAIO VPCF11 User Manual

VPCF119FX, VPCF114FX, VPCF11LFX, VPCF11GGX, VPCF116FX, VPCF11QFX, VPCF11KFX, VPCF111FX, VPCF11JFX, VPCF11CGX, VPCF119HX, VPCF113FX, VPCF11FGX, VPCF1190X, VPCF11EGX, VPCF112FX, VPCF11HGX, VPCF117FX, VPCF11NFX, VPCF11AFX, VPCF119GX, VPCF11BFX, VPCF11DGX, VPCF115FM, VPCF11MFX, VPCF11PFX