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Try to press Fn + Num Lock or Fn + Scrl lock to check if they keyboard will respond. If it doesnt. try to turn off the computer, remove the cables and battery, press/hold the power button for 8 secs. Reinsert cables and battery then turn on the pc. Press again Fn + Num Lock or Fn + Scrl lock. If the keyboard still did not respond, go to the device manager . Click Start > right click My Computer > Properties > Hardware > Device Manager . Then click the (+) on Keyboards, right click the device and uninstall it. Then, go back to the device manager and right click Keyboard then click Scan for hardware changes. Then press FN + Num Lock or Fn + Scrl lock. If symptom persists, call HP to replace your keyboard.
puddy cat has stood on whats called a sticky key if you have a user book it will tell you how to release it.i cant quite remember the exact key to use but you have to press and hold down the fn key then hit one of the F keys.F2 for example, i just cannot remember which F key it is. hope this helps
This might sound radical but I had this problem only it involved a dog playing kick the laptop and then sitting on the keyboard. I simply went to the control panel > device manager > scroll down to the keyboard and right click and choose unistall. Make sure that when you reboot, you have internet access so that if the laptop needs it can search windows update if it needs to install a new driver. The computer will read the new hardware and install a driver for it, this essentially resets all the default settings. The only other place I know of that has keyboard settings besides the Fn + key combos is the Language and Regional settings in the control Panel. I believe if you uninstall the keyboard and then reboot, all the settings should fall back to the default settings for a newly installed piece of hardware.
There is a master function key that you hold down while tapping another function located on the keyboard. This all depends on the model of laptop. Next time try to giva a little more info like make and model, which is located on the bottom. The function key or Fn key is usually located on the keyboard near the Alt and Control key lower left. while holding this key down, you tap the corresponding brightness key on the number of the keyboard, some times the brightness is on the 4 arrows on the right side of the keyboard...sometimes they are the numbers 6 or 7 look for what appears to be a symbol that looks like the sun or a light. Hold down Fn and tap the key that brightens the display.
I had the same problem after my fat cat sat on my keyboard. This is how I fixed it. At the top of the keyboard there is a F9 key. If you look closely at this key, it also has two pictures of the mouse pad. This key is a toggle that turns the mouse pad on and off. Down near the lower left corner of the keyboard is a key marked FN. Hold down the FN key and press the F9 key. That will turn the mouse pad back on.