So i have a strange?(i hope just for me) issue. The power board does what it should, it generates the 15V -15V and the 5V. The synth powers up, but when i connect the VoiceBoard KLM508, the voltage drops to the tenth of its original, and slowly decreases, until it converges around 1.3…V. The fuses are fine, everything else looks OK. Powering the other board does not really produce any difference.
If anyone have some advice, thank you!