Jeannine Posted March 26, 2020 Share Posted March 26, 2020 When playing the piano, if you press two specific keys, the left speaker emits a super loud annoying sound. It only happens if these keys are depressed. Quote Link to comment Share on other sites More sharing options...
Brad Saucier Posted March 27, 2020 Share Posted March 27, 2020 Unfortunately, it's likely the piano will need to be serviced to repair this. Can you upload a short audio clip? 1 Quote Link to comment Share on other sites More sharing options...
IanB Posted March 27, 2020 Share Posted March 27, 2020 Which two specific keys? Quote Link to comment Share on other sites More sharing options...
Jodie Bunish Posted September 25, 2021 Share Posted September 25, 2021 I'm having the same issue - a terrible noise happens when I play bass A and G. Where can a person find places to service keyboards? I have had no luck in my Google searches. I live in Minnesota - St. Paul, northern suburbs (Blaine, Forest Lake, Roseville, Coon Rapids areas). Thanks for your help. Jodie Quote Link to comment Share on other sites More sharing options...
timbot Posted October 14, 2021 Share Posted October 14, 2021 (edited) I'm having the same issue with my PX-150. Can anyone offer an estimate of how much the repair would cost? I uploaded a recording of the broken keys being played: Edited October 14, 2021 by timbot Added link Quote Link to comment Share on other sites More sharing options...
Brad Saucier Posted October 14, 2021 Share Posted October 14, 2021 I would contact a local technician for a quote. Quote Link to comment Share on other sites More sharing options...
timbot Posted November 3, 2021 Share Posted November 3, 2021 I have an answer from a technician: Fixing this would require replacing the mainboard of the instrument, which would cost roughly 200€. I decided that doing this would not be economical. 1 Quote Link to comment Share on other sites More sharing options...
Shahram Posted December 26, 2021 Share Posted December 26, 2021 We had the same issue. The Casio technician said the mainboard needs to be replaced and it costs around $400. Since it happens in PX-150, PX-350 and PX-850, I guess Casio chose a bad synthesizer board which is common and who knows what other models may have the same parts inside : Quote Link to comment Share on other sites More sharing options...
Maiko Posted August 25, 2022 Share Posted August 25, 2022 Hello, I have the same problem, but with middle C and middle C#. My Casio is a Privia PX-350. Anybody know how to resolve it? I need desperately to be solved, because it's my work instrument and I use it everyday! Quote Link to comment Share on other sites More sharing options...
Jokeyman123 Posted August 26, 2022 Share Posted August 26, 2022 Are these under warranty? Too bad these "cabineted" Casios are so difficult to disassemble because 2 different sounds-a clunking and buzzing, and 2 different places on the keyboard-i am no licensed Casio technician, take this the way you want. The buzzing sound-sampled sounds used for most of your tones-are "looped" samples-and if the sample gets "stuck" in one short segment of the sample, it will sound like this buzzy sound. I know this from experience using sample-based keyboards, creating my own samples to span across a keyboard on several different samplers over the years-Korg, Roland and software-based. The clunking-very odd-sounds like it could be the part of the piano sample to recreate either the attack, or even the AIR effect that creates the pedal release sound-but greatly amplified. Check your damper pedal, maybe a simple dirty connection somewhere in the pedal, the pedal jack or the pedal itself. Not to contradict the Casio techs, but if there were a consistent issue with the mainboards-it would duplicate the same sound error, and in the same spot on the keymap-the same keys would be causing the same problematic sample loop defective sound. I would try the compressed air in/around/under the suspect keys for that defect-if the sensors under the keys are partially collapsed or dirty-this is a possible source of the distorted sound, as the rubber/carbon contacts might be making partial contact even upon release, or not making full contact and causing your tone to be triggering at only one point in the sample. if I were to cut a very short segment of any sample with a software sample editor (or keyboard editor) that you would normally recognize as an instrument or synth tone and play it, this is what it would sound like. The thumping-all across or partially across the keys-mainboard could have a defect, or it could simply be a loose cable inside. If a tech checked it out, I would hope they'd noticed any questionable connections and ruled that out as it would be a shame to spend for a new mainboard, and discover the problem is still there. if a keyboard factory reset does not clear this, i would think the tech is right, might need a new mainboard. I have not experienced any defect like this on either my PX350, 560 or any of the CDP hammer-weighted keyboards for at least 4-5 years, i doubt there is a major defective run of mainboards. If there were, this would be showing up in hundreds of Casios, maybe more. We'd certainly be hearing it here. Quote Link to comment Share on other sites More sharing options...
IanB Posted August 26, 2022 Share Posted August 26, 2022 "The mainboard needs replacing" means "I'm not willing/able to do a component level repair". I wonder what the actual reason for it is. That the error in the video moves with octave selection is very intriguing. Quote Link to comment Share on other sites More sharing options...
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