My D-win machine does not begin the start of the burn process. The laser-head travels correctly on a test run without the spark, but when I activate the cooler and fans to begin the actual burn, I get a loud beep and no movement. Has anybody got any ideas why this might be happening. It is not the power supply. I had a power supply problem previously and fixed it. A bad power supply has different symptoms in that the machine begins the x-y travel path but does not burn. This does not begin the x-y travel path but just gives a single beep and no movement. I would be interested in a smaller machine after this problem is fixed. If anybody has any ideas in that regard I would love to hear them. thanks.