Yes, perform the basic is the battery/BCR sub system working by powering the engine for at least 60 seconds, and then dropping power to listen for the sounds to contnue until you get the "fart" sound as the board finally powers down long after power was removed from the track.
With BCR, the charging circuit must work and charge the super capacitors up from 0V to near 9V and that takes time. At the same time, MTH engines start in neutral in conventional, they have to perform the full strartup (I believe that is 20 seconds or so) and then they are ready for the power drop cycle to switch to forward meanwhile during the power drop depending entirely upon the BCR or battery to keep that processor running and sounds and not reboot.
A bad or weak charging system can be masked by a charged battery still providing power- where when you put a BCR into that engine, if the charging circuit isn't working, the BCR never charges up, and thus cannot provide power properly during the power cycle commands.
So sure, you could have a bad BCR, but you also could have a bad charging circuit and because the BCR is not pre-charged like a battery, the systems won't run because of processor reset due to lack of backup power.
