Well, since official devs don't sell these, I found my on ebay from Spanish seller in 3D printed case.![]()
Those in the first post.
BDM(1) and BDM3.
Remove settings and make clean one.
Settings for OPL, if you have them on MC0 then yes, you may leave settings for internet, these won't make problem.
Look up, if there are settings on USB, HDD, MX4SIO/SD, FireWire, LAN/SMB!![]()
Try to run OPL3.ELF without MX4SIO plugged in and without OPL settings (even networking) and wait around a minute, if nothing then maybe not original MC?

