Hi I am new, thanks to allow me to join this group. I am looking for some information to help me to repair my Roland MC-505 groovebox. I have a degree in electronics but this is more complicated than I thoght. The device turns on, no information on the display is showed. I check the power supply and voltages are correct. LCD its ok. I got the service manual from a google search and one of the first steps is enter into test mode, but no luck. English it is not my first language, so my appoligies about my redaction mistakes. Any information is welcome. thank you all.
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MC-505 groovebox
2013-02-25 by Andres