Thanks for the replies folks. Because it is a possible warranty issue, here are the tests I have done so far. I checked battery voltage and it is ok(fully charged from balance charger). Checked voltage to both side of the fuse, that's okay. Checked fuse continuity, that is also okay. Tried with another new battery, and same testing. So the problem has to be further back, either the trigger, the selector switch(maybe) or possible motor problem??