FUJITSU SIEMENS `AMILO` LAPTOP LI3910 - icon missing advice sought?

I have a FUJITSU SEIMENS `AMILO` LAPTOP LI3910, O/S WIN. 7 PREMIUM : unfortunatley, when i depress the FN key and F1 key to put the laptop on wireless connectivity via router; the screen icon for this operation will not display: this has always appeared on the screen previously