Same problems here! 1 completly dead sent in a month ago, not back yet. 2nd unit has the same probs as "danhfvcsd" descripes.

What I did: opened the case (unsolder wires first) after that I cleaned it well with a soft brush. I put some extra foam inside to press both boards firmly together. Closed the case, en no problems again for a long while.

Now the problems are back after a few heats racing. I'm going to open it again and have a look.

I will take some pictures to show you guys.

Hope this week my spare ESC will return then the 2nd will go for a trip to USA