WiFi problem Dell Inspiron 8600

I'm having difficulty activating WiFi on my Dell Inspiron 8600. I never had a need to use the WiFi facility until now and have accessed the internet using a dongle and mobile broadband. When I got the laptop new about 10 years ago I can remember it searching for wireless networks when I used to turn it on. It was sold as having WiFi. Since then I have gone through a few hard drives and installs of Windows XP, which is currently installed (service pk 3). Currently when I switch on my phone as a WiFi hotspot I can not access it using my laptop. I have another newer inspiron and it finds the WiFi network so problem. I have attached a screenshot from my device manager. I am not sure exactly what section of the device manager I should be looking in, concerning a WiFi card. Under PCMCIA adapters there is a reference to Texas instruments PCI 4510 card bus controller. Would this be my WiFi card? According to device manager the correct driver is installed for this device. Should I be looking elsewhere checking drivers? Also on laptop Fn F2 is supposed to connect/disconnect from WiFi? When I press Fn F2 nothing happens. However when I do the same for FnF3 which has a battery icon on it, nothing happens either so maybe there is something wrong with the whole Fn thing? Any help would be greatfully appreciated as i'd really like to get this old girl connected to WiFi