Question about Yamaha Audio Players & Recorders

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I recently acquired a Yamaha O1V digital mixer and when I power it on the LCD display lights up but the screen is blank. Also none of the buttons on the board are non-responsive. I attempted to do a factory reset as suggested in the operations manual to no avail. I did not purchase this item it was given to me. Any clue as to what would cause this issue?

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  • stevejai2002 Jun 29, 2008

    It was the 5amp fuse on the power supply that powered the logic circuitry. Works like a charm now. Thanks your help was invaluable


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To my knowledge most LCD display of this type would (at power up) indicate a systems check (all display shown) and revert to default display soon as diagnostics are finished. Since you have done a reset (revert to factory defaults) and yet no display is indicative of a major problem in the logic circuitry. I would discount any power supply issue since as you posted "...display lights..." except perhaps the +5VDC rail (which supplies the logic circuitry). The are some instances of other versions of a possibly failed memory battery.

Since diagnosis and repairs of this nature would require familiarity with electronic circuitry and components, use of a DVM and possibly a soldering iron and access to a service manual or at the very least a schematic diagram with voltage readings, it may be to your advantage to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 27, 2008

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Something has happened to it.I would be checking the internals for power supply problems,cracked PCB's, loose connectors

Posted on Jun 27, 2008

  • Graeme Ross
    Graeme Ross Jun 27, 2008

    If you cannot see anything physically wrong with it, a trip to a Yamaha repair guy may shed some light onto it for you. But it dont sound good.


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