Which is an function key in keyboard - Samsung Pleomax PKB-700B Keyboard

The purpose of a laptop's function key is to activate the secondary function of any dual-purpose key.

The function key can accidentally be locked into place if you hit the wrong combination of keys so that all of the keys only perform their secondary function.

The exact process for unlocking the function key will vary depending on the make and model of your laptop and whether you have recently used an external keyboard.

1
Check the manual that came with your laptop and locate the section on the function of each keyboard key.

Open a Web browser and navigate to the support section of the laptop manufacturer's website if you do not have the manual that originally came with your laptop.

Use the drop-down menus on the support page to choose the specific product line and then model of your laptop.
2

Click on the "Product Support" link and then navigate to the "Manuals" section of the page. Click on the link to open a PDF version of the manual for your laptop.

Browse down to the section about the functions of the keyboard keys.
3

Find the sequence of keys you need to press to unlock the function key on your laptop.
Press and hold the function key on the keyboard and then press the other keys required to unlock it.
4

Try using the most standard keyboard combinations if you don't have the manual or it does not give any information about the function key.

Press the function key and then the shift key and see if it successfully unlocks the function key. Attempt using the other standard keys in conjunction with the function key, such as the "F11," "F12" and "Ctrl" keys.
5

Plug a USB keyboard into the USB port on your laptop if you have recently used an external keyboard with the laptop.

Check the light above the "Numlock" key on the external keyboard and see if it is turned on. Press the key and make sure the light is turned off and then remove the keyboard to unlock the function key.

http://us.acer.com/ac/en/US/content/support
Acer Support

Function keys are special keys used for assigning program shortcuts and specialty tasks to the keyboard.
They are located at the top of most keyboards and labeled "F1" through "F12."
Some keyboards may only feature 10 function keys, while others may have as many as 18. These keys often go unutilized by the average computer user, but they may have very important tasks for some users, which can lead to problems when the keys do not respond.
Fixing nonresponsive or malfunctioning function keys is quite simple, and should only take a few minutes.

Connect your keyboard to your computer, and power it up.
Open a program that uses the function keys such as Microsoft Word or Microsoft Excel. Check your keyboard for an "F-Lock" or "Function Lock" key.
This key is used to toggle function-key support; when it is toggled on, the function keys will not work.
Press the "F-Lock" key and then try using a function key in the selected program. "F1" is a good key to test, because it is set to open a "Help" document in all Microsoft software.
If the key does not work, press the "F-Lock" key a second time, and test the keys again.
If the keys still do not work and you are running the Windows 7 operating system, you may need to install a "hotfix" from Microsoft to fix the key functionality.
Navigate to the link entitled "Microsoft Support: Some Function Keys do not Work Correctly." (See Below.)
Some function keys or keyboard shortcuts do not work correctly on a computer that is running Windows 7
http://support.microsoft.com/kb/975741
Resolve unexpected Function (F1 - F12) or other special key behavior on a Microsoft keyboard
http://support.microsoft.com/kb/894513
Click on "View and request hotfix downloads" located beneath the title of the article to access the Microsoft Hotfix database.
Agree to the terms and conditions, then download the hotfix.
When the download is finished, run the downloaded file and follow the on-screen instructions.
You may need to restart your computer after the installation is complete.
Your function keys should now work properly.

Step 1:
Function keys are special keys used for assigning program shortcuts and specialty tasks to the keyboard. They are located at the top of most keyboards and labeled "F1" through "F12." Some keyboards may only feature 10 function keys, while others may have as many as 18. These keys often go unutilized by the average computer user, but they may have very important tasks for some users, which can lead to problems when the keys do not respond. Fixing nonresponsive or malfunctioning function keys is quite simple, and should only take a few minutes.

Connect your keyboard to your computer, and power it up. Open a program that uses the function keys such as Microsoft Word or Microsoft Excel. Check your keyboard for an "F-Lock" or "Function Lock" key. This key is used to toggle function-key support; when it is toggled on, the function keys will not work. Press the "F-Lock" key and then try using a function key in the selected program. "F1" is a good key to test, because it is set to open a "Help" document in all Microsoft software. If the key does not work, press the "F-Lock" key a second time, and test the keys again. If the keys still do not work and you are running the Windows 7 operating system, you may need to install a "hotfix" from Microsoft to fix the key functionality. Navigate to the link entitled "Microsoft Support: Some Function Keys do not Work Correctly." (See Below.) Some function keys or keyboard shortcuts do not work correctly on a computer that is running Windows 7 http://support.microsoft.com/kb/975741 Resolve unexpected Function (F1 - F12) or other special key behavior on a Microsoft keyboard http://support.microsoft.com/kb/894513 Click on "View and request hotfix downloads" located beneath the title of the article to access the Microsoft Hotfix database. Agree to the terms and conditions, then download the hotfix. When the download is finished, run the downloaded file and follow the on-screen instructions. You may need to restart your computer after the installation is complete. Your function keys should now work properly.

Step 1:
The purpose of a laptop's function key is to activate the secondary function of any dual-purpose key. The function key can accidentally be locked into place if you hit the wrong combination of keys so that all of the keys only perform their secondary function. The exact process for unlocking the function key will vary depending on the make and model of your laptop and whether you have recently used an external keyboard.

Check the manual that came with your laptop and locate the section on the function of each keyboard key. Open a Web browser and navigate to the support section of the laptop manufacturer's website if you do not have the manual that originally came with your laptop. Use the drop-down menus on the support page to choose the specific product line and then model of your laptop. Click on the "Product Support" link and then navigate to the "Manuals" section of the page. Click on the link to open a PDF version of the manual for your laptop. Browse down to the section about the functions of the keyboard keys. Find the sequence of keys you need to press to unlock the function key on your laptop. Press and hold the function key on the keyboard and then press the other keys required to unlock it. Try using the most standard keyboard combinations if you don't have the manual or it does not give any information about the function key. Press the function key and then the shift key and see if it successfully unlocks the function key. Attempt using the other standard keys in conjunction with the function key, such as the "F11," "F12" and "Ctrl" keys. Plug a USB keyboard into the USB port on your laptop if you have recently used an external keyboard with the laptop. Check the light above the "Numlock" key on the external keyboard and see if it is turned on. Press the key and make sure the light is turned off and then remove the keyboard to unlock the function key.
b>

Depend on the manufacture of the keyboard.. The disk that came with the keyboard will define each function keys setup .Different software use function keys to do specific function which is not the same for every programs. Game softwares will define each funcfuntion keys setup.

Because you have a multimedia keyboard, there are additional functions for those special function keys. The icons on the keys will tell you if they do something special (like play sounds, increase the volume, etc) This kind of keyboard is designed for those who play DVDs and CDs and don't want to have to open a menu on the screen to quickly play music, etc.

if it not manufactured with the function button i think you can't use another kays as a function keys

best regards

There may be a function on the keyboard to disable it. Look on keyboard and see if there is any function keys that has a keyboard on it. You may need to press the FN key and the other key with keyboard to enable and disable the feature.

you can fix the problem by following the steps

1. tep 1 Check the manual that came with your laptop and locate the section on the function of each keyboard key. Open your web-browsing program and navigate to the support section of the website if you do not have the manual that originally came with your laptop (see Resources below). Use the drop-down menus on the support page to choose the specific product line and then model of your laptop.
   
2. Step 2 Click on the "Product Support" link and then navigate to the "Manuals" section of the page. Click on the link to open a PDF version of the manual for your laptop. Browse down to the section about the functions of the keyboard keys.
   
3. Step 3 Find the sequence of keys you need to press to unlock the function key on your laptop and note them down. Press and hold the function key on the keyboard and then press the other keys required to unlock it.
   
4. Step 4 Try using the most standard keyboard combinations if you don't have the manual or it does not give any information about the function key. Press the function key and then the shift key and see if it successfully unlocks the function key. Attempt using the other standard keys in conjunction with the function key, such as the "F11," "F12" and "Ctrl" keys.
   
5. Step 5 Plug a USB keyboard into the USB port on your laptop if you have recently used an external keyboard with the laptop. Check the light above the "Numlock" key on the external keyboard and see if it is turned on. Press the key and make sure the light is turned off and then remove the keyboard to unlock the function key.
   

thanks

It may happen that ur keyboard drivers are available and u have not properly installed so according to me first uninstall and then reinstall it.It may work