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The LCD display on our yamaha DGX620 has disappeared: it lights up but there is nothing showing on it. Have tried adjusting the contrast button with no success. Any ideas please? Gill

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I have the same problem after lending it out to someone, could it be that it was left on for a long period of time ? did you find a solution yet?

Posted on Jun 18, 2010

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I would open the unit and see if a cable to the display has fallen off.

You have not mentioned if unit is operating except for that.

If totally inopperative, check power supply to the unit. The display can illuminate well below the operating voltage for the synth.

Posted on Apr 30, 2010

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Dear Joseph,

I had similar problem with my DGX620. In my case the display sometimes got blue and sometimes worked fine. The cause was a bad contact of the display flat cable.
I opened the DGX620 and then I cut a small piece of plastic film (35mm negative) with exactly the same width of the flat, disconnect the flat cable and then reconnected it using the film on the other side (non contact side) to increase the pressure and guarantee a good contact. No more problems from nov-2012 till now.

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