Why is there no sound

If your Casio Celviano AP-65 turns on but there is no sound, there could be several possible causes for this issue. Here are a few steps you can try to troubleshoot the problem:

1. Check the volume: Make sure that the volume on the piano is turned up and that the volume control on any external speakers or amplifiers is also turned up.
2. Check the connections: Make sure that all cables and connections are securely plugged in and that there are no loose or damaged cables.
3. Check the power supply: If the piano is plugged into an outlet using an extension cord or surge protector, try plugging it directly into the wall to eliminate any issues with the power supply.
4. Check the internal speakers: If the piano has internal speakers, make sure that they are not damaged or malfunctioning.
5. Check the settings: Make sure that the piano is set to play through the internal speakers or any connected external speakers or amplifiers.

If these steps do not resolve the problem, it may be necessary to have the piano inspected by a professional. They will be able to diagnose the issue and recommend the appropriate repair.

have the power checked at the piano end of the cord to rule out the adapter.

Experiencing discomfort or pain in your ears while playing your Technics digital piano is not a normal occurrence and could be a sign of an issue that needs attention. There are a few potential reasons for this phenomenon:

1. Frequency Range: It's possible that certain frequencies produced by the piano are resonating with the natural frequencies of your ears or the surrounding environment, causing discomfort. This could explain why you feel it more in specific ranges of the keyboard.
2. Acoustic Properties: The sound produced by the piano might be reflecting off nearby surfaces or causing standing waves in the room, which can create resonances that affect your ears.
3. Volume Level: If the piano's volume is too high, it could lead to discomfort or pain in your ears. Even if the volume seems moderate, it's possible that specific frequencies or overtones are causing issues.
4. Headphones: The fact that you don't experience this issue when using headphones suggests that the problem might be related to the piano's built-in speakers or its interaction with the acoustics of your environment.
5. Electronic Components: There could be a malfunction or interference in the piano's electronic components that is affecting the sound output in a way that causes discomfort.

To address this issue:

1. Volume Control: Try lowering the volume of the piano and see if the discomfort lessens. Gradually increase the volume until you find a level that doesn't cause discomfort.
2. Room Acoustics: Experiment with placing the piano in different locations within the room to see if it affects the sensation you're experiencing. You could also try using soft materials like curtains, rugs, or acoustic panels to dampen reflections and standing waves.
3. Equalization: If your piano has an equalizer or tone control settings, try adjusting them to see if it reduces the discomfort.
4. Professional Inspection: If the issue persists, consider having the piano inspected by a technician to check for any electronic or acoustic anomalies.
5. Expert Advice: If none of these steps resolve the issue, it might be best to consult with an audiologist or a professional musician who has experience with piano-related sound sensitivities. They might be able to provide more personalized advice and recommendations.

Your health and well-being are important, so it's essential to address any discomfort or pain you're experiencing while playing your digital piano.

The two leads that interrupt the signal to the speakers when the jack is plugged stay open. You'll need to open the unit and inspect to see if they are bent away from each other.

usual problem with casio
the solder broken in dc jack in to the piano

Theres no reset that i know of. Have you checked the power box (plugs into the AC outlet) voltage and that it is working as it should?

Test the adapter with a meter... Most probable cause is a bad power connector. Often the solder at the input power connector breaks loose is only problem. If you are not electronically adept, best to take it to a shop.

Make sure you have the CORRECT adapter for the unit. It should say Yamaha on it and match the voltage and polarity. Thest the output with a meter. Common problems that happen to the piano itself causing the symptoms is a broken power connector or broken solder at the connector. Use a meter and verify the adapter is producing output. Expect the output to be a bot higher than listed when not plugged into the piano as there is no load on the adapter.

1000 Watts? Well, those are peak values. !000 watts RMS into a 12 inch speaker and it would smoke... this is some of our inflated advertising. But that is beside rhe point... now on to your problem: What you are having is a ground loop. You may have to do more than one thing to correct this here is the things to do in the order to do them to solve the problem:

1. Connect the piano and the speaker to the SAME power source or receptacle, even if you have to run an extension cord, three wire of course. Plug all of this ONLY into a grounded outlet, if your house has only two wire plugs, then you need to get an electrician to install a grounded receptacle.

2. Use Balanced lines. This means XLR or TRS balanced cables between the piano and the speaker. Use the 1/4 inch jacks output, not the RCA ones.

3. Since the AUX outputs do not support balanced lines, the next step require you use DI box. They are about $20 from Guitar Center and others. With very short 1/4 inch mono cable connect the piano to the DI box from the L/R mono piano to the high impedance input port of the DI and set the ground lift switch to "LIFT". Use an XLR to XLR cable from the DI box to the speaker. This last step if needed is the last thing in our bag of tricks to break the ground loop that can cause the buzz. Dirty power, if you have lamp dimmers can be a source of the noise.

I have a Korg C-15s and also experiencing loud crackling sounds when I turn it on. The problems seems to be either the sliding volume control or the amplifier itself. Honestly though, I believe the issue is the volume control. I opened my piano to get a closer look and attempted to clean the contacts on the volume. Unfortunately after cleaning the contacts, the crackling sounds became somewhat worse. After I turn the piano on, the volume control is generally rendered useless......volume set to low volume and the noise is quite loud and other times the volume control is set high and get very low volume crackling noise. No real consistency. The noise does diminish after a few minutes but so does the piano sounds to an inaudible level. There were a couple of instances where I turned it on and surprising enough, no no noise and perfect sound. For these reasons I believe the issue is within the volume control and not so much the amplifier. I have an electronics background and noticed that the volume control is very unique in design and is not something that can be substituted with another volume control from other sources.

My recommendation is to check the sound quality of the audio from the RCA L/R audio outs on rear of the piano by connecting to a stereo receiver. If it sounds fine you're in luck. If the crackling sound does not diminish after a few minutes like mine does, I would suggest disconnecting the internal speakers and using the audio out only. You can connect a pair of studio monitors or high quality computer speakers, preferably with a small subwoofer to deliver the full audio range and deeper tone of a real piano. I'm currently using a basic pair of Logitech computer speakers and is quite acceptable until I can afford a high quality set of monitors or relocate my piano closer to my high quality Yamaha receiver.

I hope this info helps a bit.