Removing a Key-cap
Simply slide a fingernail, or similarly flat, stiff edge, under a top corner of the key-cap and pull up gradually until the key-cap "pops" off.
Replacing Scissors
Standard Size
Most key positions have 4 metal "hooks" protruding from the keyboard base which hook onto their white plastic hinge scissor mechanism (see top row of 3 images at right).
First, slip the top of the plastic hinge scissor under the 2 top hooks. Secondly, press (gently) down on the lower half of the plastic hinge to push it over the 2 bottom hooks.
Tip: The top, upward facing side of the scissor is flat and flush,
while the downward base facing side is not.
Small Size
The smaller keys ("f1" etc.) in the top row of the keyboard use 2 metal "hooks" + 1 wider "flange" which hooks onto their corresponding white plastic hinge scissor mechanism (see top row of 3 images at right).
First, slip the plastic hinge scissor under the flange. Secondly, press (gently) down on the other half of the plastic hinge to push it over the 2 hooks.
Other Variations
Replacing scissor mechanisms for the larger key positions involves small variations on the methods used for the standard sized and small key positions. For slightly larger than standard sized key positions (for example the control, "ctrl", positions), everything is just like the standard size case except that the plastic scissor mechanism is a little wider (it is "just like" the standard size scissor in that it uses 4 similarly arranged hooks). There are a few even larger key positions (for example the "left shift" and "enter") that use 2 of the scissor mechanisms used for the smallest key positions - so replacing these is just like the small case but repeated twice. Finally, the largest of all key position, the space bar, uses 2 of the larger scissors used for key positions such as the control, "ctrl" keys.
Removing Scissors
The process of removing type W2 hinge scissor mechanisms is basically the reverse of the method of replacing these scissors (see the section on replacing scissors above). However, there are a couple of extra things to know. Scissor mechanisms are easier to remove when the keyboard is at a warm or hot room temperature (i.e. 75°F (24°C) or more). Note, if you move a computer from a cool room (less than 68°F, 20°C) to a warm room (more than 75°F, 24°C), it can take a while (roughly half an hour) for the computer to warm up. The reverse of pressing down on the scissor, the scissor lever-up, is aided by the use of a small stiff object (for example, a prong of a table fork) to get under the scissor mechanism to lever it off the hooks (do this gently!)).
Disclaimer
This help guide is provided as is and irithm takes no responsibility for any injury or damage done to yourself or your laptop through actions that include opening the interior body of your laptop or inserting or removing anything into or from any its ports (USB, ethernet etc.) or through the use of laptop key parts (key-caps and key scissors) not purchased from irithm through ebay.com.
Laptop key replacement should not affect warranties but you have to check your own warranty to be sure.