HP Compaq NX9000 Reference Manual page 52

Making Wireless Network Connections (select models only)
Turning off communication and ending a connection
1. Important: close any files that reside on other network computers.
2. To turn off the wireless 802.11 communication without turning off the notebook,
press the wireless on-off button. This also turns off Bluetooth communication if it
was enabled.
–or–
Right-click the wireless network connection icon in the taskbar, then select
Disable.
Putting the notebook in Standby or shutting it down also turns off the wireless
function.
Modem and Network Connections
Reference Guide 43