It sounds like you are experiencing a problem with your Casio Privia PX-135 keyboard. There could be several possible causes for this issue, including problems with the keyboard's internal hardware or software, or issues with the cables or connections between the keyboard and other equipment.
To troubleshoot this problem, you could try the following steps:
- Check the connections between the keyboard and any other equipment, such as an amplifier or speakers. Make sure all cables are securely plugged in and not damaged.
- Try a different set of speakers or headphones to see if the issue is with the keyboard or the output device.
- Check the keyboard's settings and make sure that it is configured correctly.
- Try resetting the keyboard to its factory default settings. This can often resolve issues with the keyboard's software or firmware.
If none of these steps help, it is possible that
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