Does anybody know where I can get a service manual for a Roland RD-2000? I am trying to diagnose a blank display on mine. Right now when the power button is pressed there is no display and no led indicators light up. So far I do not think it is the SMPS (switch mode power supply) because I am getting 5 - 28 VDC reads at the sub board assembly after the power button is pressed allowing the feedback wires to activate the power supply output. The sub board assembly is the one that the display plugs into. The SMPS outputs also plugs into this board. This is where I am getting stuck. I need to know what voltages should be at test points. Thank you.