How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask MusicTech14 Your Own Question

MusicTech14, Technician
Category: Electronic Musical Instruments
Satisfied Customers: 419
Experience:  20 yrs experience in service & support of music instruments
Type Your Electronic Musical Instruments Question Here...
MusicTech14 is online now
A new question is answered every 9 seconds

Hi, I have an old Yamaha Cvp 207, and there is no sound when

Resolved Question:

I have an old Yamaha Cvp 207, and there is no sound when i play.
but if i use an external expander i can hear sound from the expander connected to the midi output of the cvp.
or if i use an external audio source plugged in input of the cvp, the audio sound can be hear.
So it seems like all midi, audio monitor works, but only the sounds of notes from the keyboard don't work.
So is it a problem on Motherboard Or not ?
Thanks in advance
Submitted: 4 years ago.
Category: Electronic Musical Instruments
Expert:  MusicTech14 replied 4 years ago.

You have done some very good troubleshooting. You have confirmed that the keys work, and that the analog audio circuitry works to some extent. That leaves a few other possibilities. One is that the digital sound generating circuitry is not working, and the other is that there is just a settings issue that needs to be corrected. I am hoping it is a settings issue.

A common settings issue that causes these symptoms on a keyboard is for MIDI Local Control to be inadvertently turned off. If that is the case, then simply go into the MIDI menu and turn Local Control on. You can also go to the SYSTEM RESET tab of the UTILITY menu and press the button next to MIDI SETUP to reset all the MIDI settings.

As a side note, A quick way to check if the problem is caused by the local control setting is to plug a MIDI cable between In and Out of the Clavinova (so it sends MIDI to itself) and see if the sound comes back.

Sometimes the programming in electronic devices gets a little confused. As a last resort, a factory reset may help correct strange problems. To perform the factory reset on the CVP, go to the SYSTEM RESET tab of the UTILITY menu and press buttons 1 and 2 under the display. This will set most things back to how they where out of the box and will erase custom settings. So make sure you save any custom sounds or songs.

If the resets don't work then there is probably a hardware issue that will require service. Lets hope that isn't necessary.
Customer: replied 4 years ago.
I did all things you said me but no way! The problem persist!
My question is:
1. Can you identify (by your experience) which part of the mother board should be replaced ? Have you the reference of the concerned parts ?
2. If motherboard need to be replaced completely, Do you know where can i find it ? And what is the reference of this ? Can you advise me?

Expert:  MusicTech14 replied 4 years ago.
A motherboard is a very complicated thing and there are a lot of things that could go wrong resulting in no sound. It is not possible to determine what part may need to be replaced based on just a symptom description. To determine what is wrong, a technician would have to go in and test the board to componet level, starting with a visual inspection and following up by checking voltages, clock signals, and data and address lines.

Complicating things is that the problem may not even be on the main board. The CVP-207 has a daughter board connected to the main board that is part of the audio generating circuit. What you may want to do is make sure that board is securely plugged in as well as all the other connectors.

To go beyond that, I would strongly advise having a qualified technician look at it. Internally, you are dealing with small surface mount soldered electronic components, which are not easy for a novice to work on. The only other option, guessing at which boards may be bad, could get very expensive. For example, the daughter board, as listed by Yamaha's US parts web site, is $365.79 (Part # XXXXX ).

The main board is part # XXXXX and is listed as "not orderable"

The web site address for ordering Yamaha parts in the US is
If you are in another country you should contact the distributor in that country for information on how to order parts. You can find international distributor information at
MusicTech14, Technician
Satisfied Customers: 419
Experience: 20 yrs experience in service & support of music instruments
MusicTech14 and other Electronic Musical Instruments Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Previous | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • jaimzness



    Satisfied Customers:

    DAW and MIDI techniques. Keyboard and synthesizer programming. Electronic repair.
< Last | Next >
  • jaimzness's Avatar



    Satisfied Customers:

    DAW and MIDI techniques. Keyboard and synthesizer programming. Electronic repair.
  • stereoaz's Avatar



    Satisfied Customers:

    20 years repairing electronic musical instruments,amplifiers,speakers.
  • Tyler, M.M., CAGO's Avatar

    Tyler, M.M., CAGO

    Professional Musician

    Satisfied Customers:

    20 years training & experience. Familiar with a variety of instruments.
  • Steve G.'s Avatar

    Steve G.


    Satisfied Customers:

    I have played electronic keyboards for 40 years.
  • Daniel's Avatar



    Satisfied Customers:

    BSEE (Electrical Engineer), 10+ years electronic design experience ,chip, board, component expert
  • Musicman's Avatar


    Customer Service

    Satisfied Customers:

    I have built and serviced hundreds of electronic musical instruments.
  • Rod's Avatar



    Satisfied Customers:

    Engineer - Electronic equipment repair