I am having troubles fixing a Roland D-5 that will not initialize. In startup I have only some yellow blocks on the display and the led buttons illuminated.
It appear that the reset line is unstable but I can not pin point the culprit.
I have so far replaced:
-The voltage regulator (IC1)
-Caps C2, C66, C68, C3 and C4
Attached is a picture of the Reset line dropping and the Display. Also a link to the Wiring Diagram
Would anyone be able to assist with this as what should I look for next?