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[on:]

I did try a different cable and a different USB port. It also doesn't give the "USB device plugged in" sound which it should, I guess. In devices I only have one com port which is present wether or not the mega is plugged in. When I plug it in, no new device pops up in the device manager at all. BUT the duino is receiving power and running the default blink program. Any hints?

[Reply #1 on:]

http://arduino.cc/en/Guide/HomePage

[Reply #2 on:]

Not very helpful.

Plug in your board and wait for Windows to begin it's driver installation process.  After a few moments, the process will fail, despite its best efforts

It doesn't do anything once plugged in, as I wrote above.

[Reply #3 on:]

Not very helpful.

Sorry.

[Reply #4 on:]

Hmm could this be a defective unit? It's a sainsmart

[Reply #5 on:]

One last test...

• Open Device Manager
• Connect the board to the computer
• Does the list refresh?  (The board would very likely end up as "Unknown Device")

[Reply #6 on:]

It does not refresh

[Reply #7 on:]

Seems like its defective to me.