MMM V3 blows up after just 12 runs :(

[Revorocks]

Well it didn't blow up, it went out quietly.
It was running in a Losi 8T on 4S, then suddenly stopped. No magic smoke, nothing.

Servo still receives power and so does the receiver, but there are no beeps and the fan doesn't work.

Is this the ESC or the motor?
The problem is I bought it off a forum member, brand new:
On the right




Since being off a forum I don't have a proof of purchase, but you can clearly see it's had very little use, the internals will be very clean. Also it is a V3, not the most reliable generation :(
Is there anything I can do?