MS Wireless Entertainment Keyboard 8000 - FN keys not working!

Well, do you mean only the keyboard is locked? Can you boot the system properly? Is the mouse working? Which Operating System is running on your Laptop?
Here are a couple solutions you can try before you let me know the above queries.
1. Press and hold down the Windows Logo key on the keyboard while pressing the L key on the keyboard once. In other words, Press Windows Key + L once. If this doesn't work, don't forget to include the Fn key while pressing these two keys. Windows+Fn+L. Still nothing?
2. Turn off the Machine, remove the battery and unplug the charger. Leave it for at least 10 seconds, you can press the power On button on the laptop without the battery and the charger installed/plugged in. Now re-install the battery, and turn back On the machine. It should work.
If you need further help, if the problem persists, Let me know with the details.
Good Luck.
Thanks for using FixYa.

Hi Devoo,

I got your issue , in your dell laptop to turn on the wireless switch in your keyboard press the Function key Fn+F2 simultaneously
(Fn key is in left side of ur space bar, near Alt key) automatically your wireless switch will be turned on and you will be able to go online wireless .
I am sure this will work.

Thanks & Regards,
Prema

try super glue or use tape

You choose your own code. It's a keyboard right? So it has numbers on it...and an Enter key.
1. Press and hold in the small button next to Bluetooth symbol under the keyboard for 5 seconds. The charge indicator lights at the top of the keyboard should alternate flashing red then green.
2. Search for Bluetooth devices on the devices you wish to connect the keyboard to. The Keyboard should be listed there.
3. Enter a code of your choice into the device you are paring the keyboard to and submit it. I used a 4 digit number which worked without a problem.
4. Type the same code and press Enter on the Microsoft Wireless Entertainment Desktop 8000 Keyboard.
The keyboard should now be paired with your device.
Good luck, - GregAndo

The "F Lock" is a dual function key,try pressing this key and should fix your problem.
Miklo

Try looking in your bluetooth places and see if you can add the keyboard by itself, if not remove the mouse/keyboard and try re-adding them both as a pair.

Hello, your numlock keys are ON, find your Num Lock button and press it off.
It can be a 2 button combination like FN(function button) + Num Lock button. Then it should work.
other way is to press numlock on your external keyboard and then disconnect the board. see if it works.

buy another keyboard which have FN key... theres a kind of keyboard that are not using FN key...

Go to Youtube and watch the video of key placement on
any microsoft keyboard but you need Eye piece (Lens) to
clearly see the precision parts to repair, dont loose the plastic parts.

ENTER THE BIOS AND ENABLE SET-UP CONFIG. AND REBOOT.RICHARDM69