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Anonymous Posted on Feb 17, 2010

Backlight on my Roland D50 does not show up when powered up.All that happens is that the screen changes from black to a very feint yellowy green and there is no sound at all from the synth .... any ideas? First of all part of the screen would function and the rest just pixilate. A gentle knock in the immediate vicinity would sometimes bring it fully on and playable but that has now stopped altogether ...... Writer7

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Fred Yearian

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  • Roland Master 5,603 Answers
  • Posted on Feb 17, 2010
Fred Yearian
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Joined: Jul 25, 2009
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This sounds like you have a failure in the power supply. This could be due to a bad solder joint or a failed component. The part cost should be minimal.

The backlight sounds like it is not getting the full voltage. The electronics mostly will run on 5 volts DC. Below about 4.75 volts things just won't work.

Testimonial: "Thanks for your thoughts Fredy2 ..... that sounds very likely... I'll try that route first. Thanks for your help Writer7"

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