My Yamaha Clavinova CLP-350 lost all sound. Prior to this, middle C started to have a tin-like sound. I live in South Central PA and can't even locate someone who repairs Yamaha keyboards within 50 miles. I'm wondering about possible causes for sound loss and cost effectiveness of getting it fixed if I can find a repair service.

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Try these steps:

• Perhaps inadvertently, there is a MIDI settings are changed.
  Setting LOCAL-ON must be in the ON position.
  Do this (see Figure 1):

• Connect AUX OUT (at rear panel) to an external amplifier. If the sound is heard, the damage was CLP311 power-amp.

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There are a number of fuses on the main power board ( by transformer ) the sizes differ depending on the country of use but are clearly marked on the board.

REMEMBER TO UNPLUG FROM THE MAINS BEFORE OPENING - if in doubt seek the advice of a qualified electrician

It sounds like you have a part overheating and failing, then cooling off and starting again. i would take it into the nearest Yamaha repair facility or contact your local authorized repair to come take a look before it goes out of warranty.

I am sure it can be repaired. First thing is to check the power supply. Here is a servuice manual for a CLP380... You did not mention the modelk number of your unit. I may be able to find exact manual.

http://elektrotanya.com/yamaha_clp-380.pdf/download.html

Scroll; down to "get manual" and click to download. IGNORE other download links.

call up Yamaha. They will fix it for free as it is a manufacturing fault.

Without power to the unit no sound should be generated. Make sure there are no other connections.

MAYBE you have a wall transformer behind it that is buzzing. MANY wall transformers develop buzz.

Another source is flourescent lights and even some of the low voltage halogens have noisy transformers in the base.

The control panel hinges upwards and you have to move the keybed back a bit to get at the jack. All the screws on the bottom for the keybed. I'm not sure where the ones for the control panel are.

A contact rubber for CVP-35, part number VS549800 will work, that's how I fixed my sensor problems on my CLP-360.

hi...
Your L/R jacks in the back need to connect to the "line-in" connector on your sound card.
I think the jacks on the Clav are 1/4 inch. Go to Radio shack and ask for an adapter that will take two 1/4 inch plugs/cable and convert it to a 1/8 inch stereo plug.
The Midi connects From (keyboard) To (soundcard)
Cables are available at any music store