the same thing happend to me, i thought i broke the esc. when you take off the bottem panel of the esc there is a hole in plastic part of the esc where the wires fit thru. where that hole is there are 2 contacts at the very edge and very corner of the board. i hope that helps i will post a picture later, hopefully someone can post a picture of what i am talkin about sooner.
Linear Mode
