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Remove these 5 screws.
Free the white plastic frame by pushing it (at the portion pointed by arrows) down & towards the inside to release it from the outer case
Now you have the 3 different parts. You can also see the tools i am using. Yes i used scissors to remove the screws :D
The battery can be easily flipped & kept on other side so that it doesnt interfere.
The board is still stuck with white plastic frame. Remove this screw to free it.
Here you can see the 3 parts, white frame that holds the board, the board, & the main circuit. We just need to get the circuit in its correct position.
Here is a closer look of the circuit. It is necessary that the buttons hit the circuit at the right place for perfect response
To remove the stick cover, hold on to the board & try pulling it up.
The stick loses its tight spring action over a period of time.There is nothing much you can do once it wears out.
The plastic circuit points have to match with the points on the board. If they dont , you tend to get laggy response when pressing buttons.
The plastic circuit is held in its position by those 2 protruding parts you see in red circle.
The plastic circuit tends to come out of these parts and hangs loose. Wrap the tape around the protruded part to increase the surface area.
You can also use a chewing gum :) or anything that increases the area. But whatever you use Ensure that the circuit fits in flat on both ends.
Now, lets focus on the buttons. These are simple plastic - rubber - circuit connection. Clean them up using a brush.I used the electric razor brush.
Screw the board back to the white plastic frame. For the circuit to map the board its important to screw this in completely.
Now re-assemble everything in reverse order.