Instructables

Quick and Easy Keypad fix (For most cell phones)

Picture of Quick and Easy Keypad fix (For most cell phones)
Most of us have cell phones and from time to time we tend to drop or maybe treat them with a less-than-delicate manner. In turn the cell phone will rebel and stop functioning.

Today's fix is real easy and depending on what tools you got, will probably take you between 10 to 15 minutes. It has to do with malfunctioning keypads. Generally, when a cell phone's keypad is not working properly it could be one of three different reasons:

1- Due to shock from a drop, circuitry is damaged thus no matter how hard you press you will never get the phone to register it. This issue is one that a certified technician would have to take care of and is nothing that we can fix here as it would be time consuming and expensive.

2- Because of moisture or heat, again, the circuitry could be damaged. Nothing to be done here really. The only thing to try best for a phone that's been subjected to moisture is to place it in a sealed container with rice. The rice will draw out the moisture and if there was not too much damage the phone should work fine. Click here to see a great Instructable that demonstrates this principle. Thank you keegsta123

3- The phone's keypad membrane is broken or dented. This is where we come in and fix the problem. Now keep in mind, the keypad membrane and the keypad itself are two different components; this is true for most models of cell phones, though there are exceptions. While the actual keypad is comprised of the buttons you press, the keypad membrane is what allows the keypad to register a touch to the circuit board (it is basically a thin, white, plasticated film with small metal sections of a hemisphere that act like mini Pogs). We will see what these look like and how it works later in the Instructable. Now on to the first step!
 
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shobo1 year ago
thanks man1it worked!
zack2472 years ago
close, that reflective part is a part of the backlight assembly.
so are those reflective plastic sheets. if you look at it youll notice the screen has a piece of plastic behind it that is clear on the edges and opaque in the middle. those 2 little leds (where the reflective part kind of points at) shine into the plastic and the reflector helps spread the light. those thin sheets act as a sort of diffuser and spreads the light more evenly across the screen.

touching those parts wont really ruin your screen but it will hamper the performance.

and in step 7, thats not the charger, thats the vibration motor. the charger port is just beside the headset connections.

just my little bit of info :3
I used to have this phone. I miss it.
Paul D (author)  masterochicken4 years ago
I had four of them and they were just sitting around I figured I might as well put em to use. But after years and years of not being used, being dropped in the water and all this other stuff, it amazes me how much more rugged cell design was even 10 years back. They trade apps, looks, interface, etc. for functionality and durability. Nowadays you have all these cheaply made phones with delicate material. Which reminds me, i need to get a Sonim...haha