I have bought a TX50E for my Dell Precision 3640.  I have installed it and the WiFi works fine.  The Bluetooth doesn't.  The motherboard doesn't have an F_USB plug on it but it does have a plug marked CAC/PIV on the motherboard and CAC_PIV/BT in the service manual.  It is bigger than an F_USB plug (11 or 13 pins rather than 9) but the plug from the TX50E fits on the left-most 9 pins (with the blanked-off pin in the right place).  Maybe this isn't an appropriate place to connect the TX50E Bluetooth cable?

I have updated the Dell's BIOS and installed the latest Intel Bluetooth drivers (without error) but there is no Bluetooth device showing in Device Manager (which I assume there should be if it's working correctly).  There are some Bluetooth services running (e.g. Bluetooth Support Service) but Windows Setup doesn't show a Bluetooth on/off option and won't allow me to try and connect Bluetooth devices.

Am I missing something? Any help greatly appreciated.  It's not critical (because I bought the card for WifI) but it would be nice to have it all running fully.

Thanks.