Have been running this older, upgraded Shopbot PRT Alpha and Colombo 5HP spindle for years with few issues. I've been controlling it with a Sony Vaio which has been absolutely bulletproof...until now. I retired 18 months ago and I kept one of my Shopbots for hobby work, I'm just getting it put back together now. Everything is grounded, I can power everything up and move/jog the gantry all over without issue except for when I start up the spindle. Each time I turn it on I get a comm loss message within 5 to 10 seconds. I've tried updating the firmware, checking all connections, ensuring my power and data cables are separated etc. The computer is a standalone and not connected to the net. The only way I can re-establish the comm is to do a hard boot of the PC...any thoughts???