I bought a reloaded mk2 (Order 33444) and it has sat in the box untouched since then. I decided the other day to start it up. I have used an old c64 for chips and some NOS ones. But when I switched it on it blinked red (and the d46 light blinks). So I went to debug via the usb serial port but it isn’t listed in the Mac app serial. I’m not sure what is wrong or what to do next?