Weird… yours comes up to a screen when you turn it on? Mine never actually showed anything on the screen.
after some tests, it seems, that the check program only boots if dip switch number 6 is set “on”. looks like i found it by accident. π
any idea what the other dip switches might be for? the manual only says that 1 to 4 are used to set the scsi device number, so we have 3 with unknown purpose…