No lights on the charger generally means it cannot find a battery to charge, or that the charger/cable is dead
If you have access to a Windows computer, try connecting the bike to that and running E-Tube Project 3.4.5 or 4.0.4 - then look at the components it detects. It'll tell you if it thinks the battery is missing.
(and if it doesn't connect at all, that'll tell you something about the state of the BCR2)