went through the troubleshooting page, though, all seems ok.
just downloaded snoize’s MIDI monitor, to check whether is an issue of seeing the activity more so than producing it.
On this point, however, having not connected any DINS, AINS, DOUTs, etc. I am really expecting a lot of random activity in the MIDI in monitor? (this is my working hypothesis)
If just the MIOS bootloader is on the pic you should see a continuing sysex string, the upload request. Random activity should happen when you loaded an application like MB64 and no ain etc is connected. This doesnt happen when you ground the inputs on the core. With an uploaded application just one upload request is sent when your box is powered on.
at this point I’m beginning to suspect the home-made USB interface I use (this guy I know did it) might have something to do with it, but will finish the lcd module first. Any experience with odd USB interfaces?