Problem with HP Laptop, Windows 10 connecting to a USB port for Arduino Mega

Development Tools IDE 1.x
1

Hello,

I have been running several motors from an Arduino Mega 2560. Recently, however, my laptop has stopped registering that the Mega is connected to a USB port. It instead throws an error of "Serial port 'COM4' not found" whenever I try to upload my sketch.

I've verified that all of the Mega drivers are updated, switched COM ports, unplugged/replugged my USB cable, restarted my laptop, reset the Arduino, used a different power cord, verified that all of my connections were solid; nothing seems to work.

My friend downloaded Arduino IDE and tried to run both the Linux and Windows versions. In both instances, he had the same problem. Interestingly enough, when I let the board and my laptop sit for the night and then try to restart them in the morning, everything works for about 5 minutes before the endless cycle of "Serial port 'COM4' not found" begins again. Does anyone have any insight on what the issue could be?

Grant

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2

It sounds like you are overloading the USB port by drawing to much power.

Please supply a schematic of how you have things connected and ensure the motors have thier very own power supply.

3

Schematic has been attached.