# Casio Privia PX-330 Single key not working MACP-KYA2

**URL:** <https://forums.syntaur.com/t/casio-privia-px-330-single-key-not-working-macp-kya2/8696>\
**Category:** Synth Repair\
**Created:** [April 14, 2025, 7:03pm UTC](https://forums.syntaur.com/t/casio-privia-px-330-single-key-not-working-macp-kya2/8696 "2025-04-14T19:03:05Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![snarkjazzo](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/s/e274bd/32.png) [@snarkjazzo](https://forums.syntaur.com/u/snarkjazzo)\
**Post date:** [April 14, 2025, 7:03pm UTC](https://forums.syntaur.com/t/casio-privia-px-330-single-key-not-working-macp-kya2/8696/1 "2025-04-14T19:03:05Z")

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Hi everybody,

I have a Casio Privia PX-330 in which one single A is not working. I disassembled the whole thing and discovered that the contact is on the MACP-KYA2 board. What’s strange is when the board is placed into position, the key does not sound at all, however (as you can see in the videos I link below), when I rub the rubber contacts (not sure what they are called) on the board, all the keys sound loudly except the key that doesn’t work, which sounds inconsistently. I saw someone mentioning that the rubber contacts having small rips and tears may cause an issue, which I actually did notice that the rubber contact for this key has 2 small rips, so I tested it with another rubber contact from another part of the keyboard, and the same issue happens, so I don’t think the rubber tears are the issue.

Videos:  
[Video of key in position being played, as you can see contact is being made between the rubber and the contact](https://drive.google.com/file/d/1_-F8ZGc_rPMkogbLarwOh5BNblRZhVvl/view?usp=sharing)  
[Video of rubber contacts being rubbed on each key - the key that doesn’t work is the 4th from the left which does not sound like the other keys](https://drive.google.com/file/d/1-XUYb6jIQdysOR6wK-DLwJLyNKaVwxUr/view?usp=sharing)

I was wondering how I might go about fixing this issue. Is it an issue with the traces or maybe a specific diode? If so, which one? Sorry, I’m new to this, so feel free to treat me like a 5 year old in the comments, and maybe even link me to some tutorials on how exactly to do the repair if possible.

I really appreciate it. This A has been killing me for a while and I really want my Claire de Lune to sound perfect, lol.

Thanks!