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Joined: Jul 2014
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Dear All,
I have a DGX-640 digital grand, which has been working just fine for about two years now.
Two days ago the following happened.
It concerns the pair of adjacent keys E and F, and the three adjacent keys A, Bb, B along the whole length of the keyboard. When these keys are played separately (staccato) they sound just fine. If the are played together in unison, they also sound fine. If, however, they are played legato, only the first key makes a sound.
It does not matter which key is pressed first, the other one in the pair will not sound.
Again, this concerns all the above mentioned keys along the keyboard, the problem is not only in one section.
The first time the problem appeared, it went away after a few hours. I did not do anything for it to go away. It simply did.
Yesterday, it reappeared, and so far there is no change.
Any ideas what the reason might be?
Any suggestions will be greatly appreciated.
Regards.
Last edited by Cressen; 07/17/14 03:15 AM.
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Joined: Apr 2007
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Hmm, it sounds like a computer glitch rather than a physical issue where you could take it apart and figure out what's wrong. You may need to get in touch with Yamaha regarding the warranty.
private piano/voice teacher FT
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If there's a "factory reset", do that and see if it helps.
If it doesn't, I agree with Morodiene -- it's weird, and likely a warranty (or professional repair-shop) issue.
. Charles
PS -- if it's out of warranty, you could disassemble it, and remove and re-seat every connector you see. That requires bravery and gentle fingers, but it might fix the problem. If not, you _know_ it needs professional help.
. Charles --------------------------- PX-350 / Roland Gaia / Pianoteq
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There is a factory reset; I used ther one for the DGX630 when selling. Can`t remember, but it was something like "turn off; turn on again whilst holding down the top key on the keyboard . . ." Check with your handbook or a Yamahja agent first. It`ll probably fix this glitch.
"I am not a man. I am a free number" " "
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Joined: Jul 2014
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Thanks for the responses. Yes, I have tried the factory reset, however it does not help. I guess I will have to take it to the repair shop. It is a weird glitch though.
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Joined: Feb 2012
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You might film it showing the behavior on your phone. I just know that if it were me, with my luck, it would probably work flawlessly in front of the repair person, then go back to being squirrely when I got it back home. Only half kidding. heh.
Nord Stage 2 HA88 Roland RD800
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Hmm, it sounds like a computer glitch rather than a physical issue where you could take it apart and figure out what's wrong. You may need to get in touch with Yamaha regarding the warranty. I agree with Morodiene. If a key has a physical problem, it should not matter if it is pressed right after another key, legato or not. This smells like a software bug to me. And having been burned by a major software bug that caused me to return my Yamaha AvantGrand N1, I'm a bit sensitive to Yamaha software glitches. Good luck!
Yamaha C2X | Yamaha M500-F Groucho Marx: "Those are my principles, and if you don't like them... well, I have others." Curriculum: Faber Developing Artist (Book 3) Current: German Dance in D Major (Haydn) (OF); Melody (Schumann) (OF)
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You might film it showing the behavior on your phone. I just know that if it were me, with my luck, it would probably work flawlessly in front of the repair person, then go back to being squirrely when I got it back home. Only half kidding. heh. That exact thing happened to me. I recorded the damn thing on cassette (remember them?) but the manufacturers required it to malfunction in the presence of a shop technician before they`d act. The fact that I had transporting handles fitted on it didn`t help. Took a year to fix.
"I am not a man. I am a free number" " "
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Joined: Apr 2016
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I wanted to find out if anyone found a solution to this. This problem just started. When pressing F key then the E key the E key is silent. The E key works but just not when holding the F key. I tested this up and down the keyboard and same problem on other F E keys. I wondered if anyone found the problem? It is a Yamaha P-45. Thanks, Gil
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Update to the problem with the E and F keys. Decided to try and clean cable. Read that could be the problem. It took a little while but took it all apart. Cleaned the cable that leads to the keyboard with isopropyl alcohol. Put it all back together and so far the problem seems to have gone away. It helps to have a little drill to remove the screws because there are so many but it took me a couple of hours. One note. When you get to the point of removing the keys they have what looks like a little Lithium Grease lubricant so watch how you set them down. Hope that helps the next person. Gil
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Joined: Apr 2016
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Problem came back. Will not buy a Yamaha again.
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Joined: Jun 2020
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Hi ! We are having the same issue with our 14 month old Yamaha P-125 Digital Piano. Some of the adjacent keys do not play, when played Legato. The problem occours with the pair of keys in all octaves. I doubt that is a dust problem. Definately a bug , which i hope Yamaha would help address and resolve Please refer to this video here that illustrates the problem : https://youtu.be/zXjzK-tbB6cI have been a Yamaha fan all along, and I sincerely hope Yamaha will help us fix this problem, as its completely unacceptable to have issues like this in just over a year !
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Hi ! We are having the same issue with our 14 month old Yamaha P-125 Digital Piano. Some of the adjacent keys do not play, when played Legato. The problem occours with the pair of keys in all octaves. I doubt that is a dust problem. Definately a bug , which i hope Yamaha would help address and resolve Please refer to this video here that illustrates the problem : https://youtu.be/zXjzK-tbB6cI have been a Yamaha fan all along, and I sincerely hope Yamaha will help us fix this problem, as its completely unacceptable to have issues like this in just over a year ! Is it still under warranty? If so Yamaha should fix it. They should probably do it anyway if it's only 14 months old. It seems to be most likely a problem with the contacts/sensors, dirty, degraded, etc.
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@gaurav: Is your piano still in warranty?
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Joined: Jun 2020
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Hi ! We are having the same issue with our 14 month old Yamaha P-125 Digital Piano. Some of the adjacent keys do not play, when played Legato. The problem occours with the pair of keys in all octaves. I doubt that is a dust problem. Definately a bug , which i hope Yamaha would help address and resolve Please refer to this video here that illustrates the problem : https://youtu.be/zXjzK-tbB6cI have been a Yamaha fan all along, and I sincerely hope Yamaha will help us fix this problem, as its completely unacceptable to have issues like this in just over a year ! Is it still under warranty? If so Yamaha should fix it. They should probably do it anyway if it's only 14 months old. It seems to be most likely a problem with the contacts/sensors, dirty, degraded, etc. Hi ! We are having the same issue with our 14 month old Yamaha P-125 Digital Piano. Some of the adjacent keys do not play, when played Legato. The problem occours with the pair of keys in all octaves. I doubt that is a dust problem. Definately a bug , which i hope Yamaha would help address and resolve Please refer to this video here that illustrates the problem : https://youtu.be/zXjzK-tbB6cI have been a Yamaha fan all along, and I sincerely hope Yamaha will help us fix this problem, as its completely unacceptable to have issues like this in just over a year ! Is it still under warranty? If so Yamaha should fix it. They should probably do it anyway if it's only 14 months old. It seems to be most likely a problem with the contacts/sensors, dirty, degraded, etc. Well, as the piano is 14 months old, it's 2 months outside the warranty. It doesn't seem to be a dust issue, as the same pair of keys have the same problem across all octaves. The piano has not been ever used outdoors or in dusty conditions ever.. I have written to Yamaha customer support, and they have asked me to contact their service center. I'll be trying to do this and update here on the findings. Needless to say, I am very disappointed .
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Joined: Feb 2010
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Well, as the piano is 14 months old, it's 2 months outside the warranty. If you bought it on a credit card, check the card's benefits. Many cards extend the manufacturer's warranty.
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Joined: Apr 2020
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Full Member
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That's quite an old and entry level DP. Is it because of no triple sensors on the action?
Finally bought the P515
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That's quite an old and entry level DP. Is it because of no triple sensors on the action? Well, the Yamaha P-125 was launched recently, and a successor of P-115 . I doubt it would be due to triple action. Thanks all for trying to help. Heres's my 12 year old playing on this , well before the problem started. https://youtu.be/aZmHfIVc9TE
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Joined: Mar 2021
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Hi guys, I have a Yamaha YDP-S30. It had a similar issue earlier this week when I replaced the felt stopper: Same keys in each of the 7 octaves stopped making sound. I checked each and every connection. It turned out that there is a flat cable that went lose. The cable is again flat, about 1.5-2 inches wide, with a dozen smaller wirings inside. It runs under the keys, right in the middle of the piano, and I suppose it connects the keys to the main board or other components underneath. So the solution is simple, as it had nothing to do with the piano's software or hardware. Yamaha is not to blame Hopefully this helps other piano owners later on.
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Piano
by Gino2 - 04/17/24 02:34 PM
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Piano
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