Weird problems HPI flux Blur ESC (MM2)

[Jarno1997]

I've got a really weird problem with my new HPI Blur ESC. Technically it's a Mamba Monster 2, so I thought lets post it here. I recieved the new combo last wednesday, and it worked very well untill last sunday. I was driving normally and suddenly I didn't get any response on the throttle. I removed the body and saw that the lights on the ESC were blinking correctly when I pushed the throttle, but the motor (flux Tork) wasn't responding. Since the lights were blinking like they have to and the steering was still working I think the problem is anywhere between the ESC and the motor. I contacted the guy who sold it to me, but he said he can't help me because I soldered new connectors to it and voided the warranty with that.

The strange thing is that the ESC is working sometimes. Yesterday I've droven a half battery with it without any problems. Is it just a bullet connector that isn't soldered properly to the ESC? Any suggestions?

I'm driving the car (HPI Trophy truggy) on 4S lipo (2x 2S). I have 2 sets of batterys and the problem appears on both sets. The combo never really got warm. When the problem appears and I turn the ESC off and back on again the motor doesn't do the beeps and the little jingle, but the ESC's led says it does.