OG Op-1 doesn't Turn on when USB connected

My old trusty op-1 doesn’t Turn ohne when it’s connected via USB with my mac (i’m using a saitek USB Adapter to connect it to the M1 imac.

Audio over USB ist Fully working, loading the battery too…but i have to pull the cable, then Turn on the device and Connect it while running via USB. Otherwise the Screen ist Just black and nothing Happens, no audio click or anything. Strange behaviour…