About allyou can do is make sure your connections are good and thats its getting juice from a good battery. If the LED doesn't come on, its prob internal.

These are apparently made for Futaba and the QC doesn't appear to be that great. Seems a lot of bad ones get out the door. They guys I was running 18th scale with, we must have went thru 10 or more of the MC230CRs.