hiya the lights are a blue a gap then a red.
I think you may be right about the tcu I removed it and although dry looking you can never tell whats inside. i hung the unit above a radiator with the usb cover open for a good while and replaced on the bike later with a pack of silica gel underneath...
eventually the bike will clear but might take up to 6 switch off switch on agains.
anybody else get this? any cures? have replaced battery cable and has seemed to get better but still not 100%