How to Fix Dead Keys on a Casio Keyboard

Written by dustin covert
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How to Fix Dead Keys on a Casio Keyboard
Dirt can sometimes keep Casio keys from producing sound. (piano image by jerome DELAHAYE from

It is quite common for Casio electronic keyboards to occasionally develop keys that do not produce sound, also known as "dead" keys. Most times, dead keys are due to dirt and other debris disrupting the signal that creates each key's designated tone; cleaning these contacts will solve the problem. This guide is based on cleaning the key contacts of the Casio SK-1 but can be applied to almost all of Casio's electronic keyboards.

Skill level:
Moderately Challenging

Things you need

  • Small Phillips screwdriver
  • Canned air
  • Isopropyl alcohol
  • Cotton swab
  • Digital camera (optional)
  • Soft pencil eraser
  • Needle-nose pliers
  • Anti-static device

Show MoreHide


  1. 1

    Remove the plastic back enclosure of the keyboard. Several small Phillips-head screws mount it to the top.

  2. 2

    Detach the circuit board from the plastic mountings in order to access the keyboard assembly and circuit board. This requires removing a few more small screws. At this point, it's a great idea to take digital pictures of your keyboard's innards so you have a visual record of how the keyboard was assembled. Gently lay the circuit board aside.

  3. 3

    Remove the main key assembly from the keyboard's body enclosure. Again, take pictures with a digital camera so you can see how things are assembled. Be very gentle when removing the keyboard assembly because it will probably be connected to various circuit boards by delicate wire.

  4. 4

    Locate the "buttons" that are attached to the circuit board directly underneath the keyboard's keys. You're usually looking for a strip of round buttons made of grey or black rubber that are punched into the circuit board.

  5. 5

    Remove the rubber strip of buttons from the circuit board. The strip is not glued down but simply pressed into the circuit board via a few rubber nubs and holes in the circuit board. It will take minimal effort to remove the rubber strip of buttons from the circuit board, which should reveal a long strip of black contacts underneath.

  6. 6

    Clean the contacts with a cotton swab and 90 per cent isopropyl alcohol.

  7. 7

    Reassemble your keyboard. If necessary, use your pictures as a reference. Test it to make sure that your keys are now functioning.

Tips and warnings

  • Always unplug any electronic devices before doing any sort of maintenance on them.
  • If you are not certified to work on electronics or are not confident in your abilities to do so, take your keyboard to a trained technician.
  • It is also important that you wear an anti-static device when working on electronic equipment. The static electricity that can build up in your body can send a harmful surge through the keyboard, harming you or ruining the components of your keyboard.

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