S400ca keyboard replacement

Press FN+Shift+Num Lk key at the same time

Here are FN + F key combi for your reference.

Press Fn + F9 keys for Touchpad Lock (on/off).

Function Keys:
Fn+F1 Suspend switch
Fn+F2 WLAN switch
Fn+F2 Bluetooth switch
Fn+F3 Access to the E-mail
Fn+F4 Access to the Internet
Fn+F5 Brightness down
Fn+F6 Brightness up
Fn+F7 LCD on/off
Fn+F8 LCD/CRT switch display
Fn+F9 TouchPad Lock
Fn+F10 Volume on/mute
Fn+F11 Volume down
Fn+F12 Volume up
Fn+Space Power 4Gear eXtreme
Fn+C Splendid
Fn+T Power4Phone
Fn+V Camera capture
Fn+A Light Sensor

if no service manual can be found try googling or even try
youtube, vast PCs are dismantled there. learn to look there first

first hit.
https://www.youtube.com/watch?v=hr7qHPtWPw0

the PC must be totally dismantled. (as in worst kind)

Here's the direct downlownload link: http://dlcdnet.asus.com/pub/ASUS/nb/S400CA/E7598_eManual_S400CA.pdf

1. Prior to replacing your replacement keyboard for sony vaio vgn-fe880e/h, make sure to remove the keyboard and disconnect the ac adapter from your laptop.
2. The first step to replacing your laptop keyboard is to remove the screws from the back of your vaio vgn-fe880e/h. Sometimes your laptop will have a picture of a keyboard next to the screws that need to be removed. Otherwise, see your laptop manual for details.
3. Above the laptop keyboard for sony vaio vgn-fe880e/h, you have a cover panel. If required, remove this part to easily access your keyboard. If you have screws above your keyboard, remove those screws.
4. Now that you have removed all the screws, you are ready to remove and then replace your new laptop keyboard.
5. To remove the vaio vgn-fe880e/h Keyboard, take a thin object and pry the keyboard out between the keyboard and motherboard. Be careful when removing the keyboard.
6. Now that your keyboard is loose, simply disconnect your keyboard. In order to disconnect the keyboard, pay attention to the keyboard connector and connector cable. Unlock the connector cable device and remove your laptop keyboard. Your sony vaio vgn-fe880e/h connector cable should be easy to remove by simply sliding it out.
7. Now that your keyboard has been removed, get ready to install your new laptop keyboard. Look at the back of the keyboard. If you see any screw holes, you will have a good idea of where to place the screws back in at the bottom of the laptop.
8. Connect your laptop keyboard for sony vaio vgn-fe880e/h to the motherboard keyboard connection slot. Secure the keyboard cable. Now turn your keyboard in place, and align the grooves on the bottom of your keyboard with your palmrest or plastic bezel. Secure your laptop keyboard in place, make sure it fits properly and is snug. Now simply place the screws back in place.

To determine if the keyboard or the keyboard controller is faulty, plug an USB keyboard into the USB port on your laptop. If all the keys are OK on the USB keyboard then the laptop's keyboard is faulty and needs to be replaced. If the USB keyboard also malfunctions then the keyboard controller chip on the motherboard is faulty, then the motherboard needs to be replaced, but this may not be a cost effective solution.
A replacement keyboard for your model laptop maybe available from this WEB site.Keyboard replacement, LCD screens for mobile phones, Ipods and computer equipment. http://www.yallstore.com/index.php?main_page=advanced_search_result&search_in_description=1&zenid=1lrjst3ncshlb4c7frn9bev3c3&keyword=keyboards

Connect an USB keyboard to your laptop and if the keyboard functions normally then you need to replace the laptop's keyboard or just use the USB keyboard.
You maybe able to get a replacement keyboard fron this site.
Keyboard replacement, LCD screens for mobile phones, Ipodsand computer equipment.http://www.yallstore.com/index.php?main_page=advanced_search_result&search_in_description=1&zenid=1lrjst3ncshlb4c7frn9bev3c3&keyword=keyboards

Replace the inside of the keyboard with a new piece. One of the major problems with Dell keyboards is that the plastic pieces holding the keys in place become loose or broken. You can find a cheap keyboard from Papatek.com or an electronics store. Simply take apart the new keyboard, pull the keys off your keyboard, lay the plastic piece on top and replace your keys.
http://www.papatek.com/Acer-Keyboard/Acer-Travelmate-8100-keyboard.html

Buy a replacement keyboard. They are very easy to replace.Very cheap price:http://www.notebook-parts.ca/black-hp-pavilion-dv6000-keyboard.html