Electronic – Arduino Mega 2560 not detected when connected to USB port

arduinousb

I've just received Funduino Mega 2560. This is a Chinese product and should be the exact copy of Arduino.

I am having problems connecting it to my computer and have spent several hours trying to figure it out to no avail.

My operating system is Windows 7 x64 and here are the steps that I tried:

  • Restarting Windows.
  • Pressing Reset button on the device.
  • Switching to other USB ports on my computer.
  • Using different cables (including the one that works with my printer).

None of this helps. The device is not listed in Device Manager and Windows does not produce the sound when connecting plug-and-play device. Because of this, I am unable to get to the point to install the drivers for it.

I have also tried to put the device in DFU mode by shortening RESET and GND next to Mega8U2 chip in order to try to upload a new firmware. The device is not responding.

Here's the video footage when the device is plugged in. Power LED is constantly on and L LED is flashing in a specific pattern.

Can anybody help me on how to get this thing detected by my computer?

Best Answer

After many hours of trying to find a solution, I've concluded that Mega8U2 chip serving as USB to serial converter is dead.

I could not get it to respond in any way and I ended up using my AVRISP mkII programmer and ISP interface to program Mega2560, while using TX0/RX0 pins for serial communication.

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