The system was working properly, however went to start a new project and the usb will not hold a connection with the laptop. When plugged in, laptop will recognize the printer, I normally plug it into COMM5 usb port, and as soon as I attempt to connect it to via repetier host 2.1.6 the connection drops. Occasionally, it will hold the connection long enough to start the project and then will drop the connection. I have tried moving it to a different usb port, same issue. Is the board fried? Is there a way to tell? I looked at it and didn’t see any black marks.
The USB on those are isolated, I have not heard of one going bad yet. I’m with Gene, try a different cable first, maybe try unplugging everything else and see if the naked board works (with and without the power connected).
If you get a connection at all I do not think it is the board at all. I suspect repetier or some other issue on that computer, Com 5 suggests you have 3-4 other com devices and one might be messing with things. Can you try another computer?