Quote Originally Posted by routercnc View Post
Seems like you are not alone. They would appear to use the TB6600 chip set . . .

Planet CNC • View topic - Design fault HY-DIV268N (TB6600)
Excellent link, I too stripped my duff unit down and found no thermal paste or mat under the chip, it was just loosely clamped with the two screws, not impressed.

I also ordered M542 units and they are totally different beasts, nice and cool running too.