Like the title says. Running an Avid PRO4848 with Nema34 - Yesterday as I was homing the machine, I heard a click come from the box and the machine stopped. Got the lost ESS error. Power cycled everything and was jogging the machine around and I hear a slight click inside the controller box again and loose connection again. It's the control system, once it clicks off it will turn back on again for a few mins then click off randomly again all while I am just staring at it. If it clicks off and I tap the controller box it powers on again. My 220v running to the other box never shuts off.

Seeing as it's Sunday night, was curious what thoughts might be? Machine is about 6 months old. Running Mach 4 on a windows 10 PC