I can not turn off my Wi-Fi with using fn+f2. when i press fn+f2 only my blututh device turn off. (dell inspiron 6400)

Hi,
First of all you need to check if the driver is installed. To check, click on Start > right click My Computer, click Manage, on the left side click Device Manager > check the right pane, you will see all the devices installed on your machine on that pane. Check if your wireless device is installed properly. If it has no marks on it on the device manager, you might just need to enable the device itself. Most Dell computers uses Fn+F2 keys to activate the wireless. if it has a yellow mark, just install the driver and you're done.
Hope this works.. Regards...

Try resetting bios defaults 1st
You can use an external keyboard and the scroll Lock key in place of the Fn Key, or get a replacement keyboard here:
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p5197.m570.l1313&_nkw=Inspiron+6400+keyboard&_sacat=See-All-Categories

Hi

i think it is the blue FN key bottom right and the F2 key above the no 2 key
so press FN+F2 both at the same time

hope this works for you

In Dell Inspiron 1520 Notebook, there is a switch on the left hand side of the laptop to enable/ disable Wifi. Make sure that it is on and with wireless light activated - Press and hold Fn and press F2 (Fn+F2). This will enable the wi-fi and you will be able to detect and connect to a wi-fi network


Let me know if any further clarification/ assistance is required.

GoodLuck!
Dont forget to appreciate the solution if I could have been of any help!
CreativeTECH

Either: Fn+F2 or Fn+F8 or Fn+F12

There may also be a little on/off switch on the side or front of the laptop that you need to check is on.

Fn + F2 to enable wireless on an Inspiron

You can turn on/off Bluetooth and Wireless using the Fnand F2 key.
To enable or disable wireless networking, press <Fn><F2>.
Turns on when a card with Bluetooth® wireless
technology is enabled.
NOTE: The card with Bluetooth wireless technology is an optional feature, so the ordered the card with your computer. For more information,
see the documentation that came with your card.
To turn off only the Bluetooth wireless technology
functionality, right-click the
area and click Disable Bluetooth Radio.
To quickly enable or disable all wireless devices, press
<Fn><F2>.

Please refer the page #69 to 74 for complete information on the Wireless and Blue-tooth

http://support.dell.com/support/edocs/systems/ins6400/en/om/MD402AO3.pdf

is ur WIFI connected thru USB ?
then ur USB is losing power...
check if ur USB setting...
go to Device Manager/USB Serial Bus/USB root hub...
go to each ports one by one....right click on each check properties...check Power Mgt tab....
remove the Tick in the box that says "Allow computer to save power'....
close Device Manager/ Shutdown and restart....

Press the FN+F2 to turn on then the wifi light will turn green.
Else you'll have a sliding switch in the sides of the laptop to turn on wireless.

Good luck.

The Wi-FI light turns on when wireless networking is enabled. To enable or disable wireless networking, press and hold the blue <Fn> key and press the <F2> key. The <Fn> key is located on the lower left hand side of the keyboard.


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