How to Install the Rubber Spring Cup on Your Laptop Keyboard
The rubber spring cup is the piece that lays underneath the key cap, in the middle of the retainer clip. The rubber spring cup serves three functions:
1) To return the key cap to its resting position (fully up) after pressing it down
2) Provides tactile feedback to let your fingers know that you have made a keystroke, and
3) Allows the electrical connection on your keyboard that triggers a key stroke event to the laptop's processor. Basically, without a functioning rubber spring cup, the key pretty much useless.
With every laptop key repair kit, we provide a replacement rubber spring cup with every order automatically, at no extra charge. Below are the steps to re-attach or repair the rubber spring cup:
Note: some cups are installed in the middle of the plastic retainer clip and some are placed underneath the retainer clip. It is apparent which setup you have with the key cap removed.
First, the cup must be centered on the keyboard base, often times there is a circle printed on the keyboard to show where the rubber cup belongs. Next, if possible, press the key cap into place and this is normally sufficient in keeping the cup in place.
If you have trouble getting the rubber cup to stay in place, you might need to add a small dab of super glue on the edges of the rubber cup. It is best to put a small amount of glue on the tip of a toothpick and use it to apply it on the outer edged of the cup. Remember to use it sparingly as a little goes a long way. If you use too much it will affect the bounce of the key and worse, may seep under the spring cup and insulate the electrical connection making the key unresponsive.