I have a SKU40939 milling machine that's a couple years old. I was using it to set a tap by opening the lid where the run switch was open. I then set the tap in the hole and bumped the start button to start the tape then I turned the spindle by hand and taped the hole .I then pushed the reversing switch and then the start button and backed the tap out.I then reset the reversing switch back to clock wise and proceeded on the second hole.. I did the same however the start button no longer works.. I then shut the lid closing the run switch and nothing happens .. I'm no electrician and don't know where to turn for help. I have gotten no response from Harbor Freight Customer Service and hope someone hear can help me remedy this no start problem..