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Author Topic: Arduino Mega2560 USB connection not working  (Read 142 times)
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I was working on my robot the other day and after 2 hours of uploading and testing new code, the comm port suddenly died out. I unplugged and plugged the cable back in. I reinstalled the drivers. I tried to plug the arduino into other computers. I tried with different cables. It still won't work. A USB cable will power the device, but nothing else.

The arduino itself is still operable.  It sends out PWM signals and follows the flawed logic I uploaded the last time, but it won't be recognized  as a device on any computer. This leads me to believe the USB connection is the problem. Either the hardware itself or the driver on the device.  I have asked many people, but they have not been able to help me fix this problem.

Is there anything I can do to fix this? I know the processor and the peripherals still work, but the communication with a computer is not working.
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There are many similar threads, try to find inspiration in these (for example):
http://forum.arduino.cc/index.php/topic,178994.0.html
http://forum.arduino.cc//index.php/topic,191873.0.html
http://forum.arduino.cc//index.php?topic=191983.0.html
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Arduino Uno R3, Arduino Mega 2560 R3, Ethermega (R3), and some Ethernet Shields (R3), Chronodots, TMP36 sensors, DS18B20 sensors, LCDs/TFTs, RS232C to learn and play...

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