Arduino Nano Comms Problem

OK, I'm new to microprocessors and the arduino platform so please forgive any stupidity :D

I think I've killed my nano. There is a chance that I accidentally caused a short circuit while the nano was connected via usb to my laptop, as, well, it no longer works.

When connected to the USB power the tx/rx LEDs flash as usual, then the onboard LED flashes on and off very fast. That's certainly not the program that I was playing with before the problem started (I was playing with serial comms).

I spoke to a helpful chap on the arduino IRC channel and he suggested that perhaps it was the FTDI chip that was broken, as my dmesg output is;

[ 667.514252] usb 1-2: new full speed USB device using uhci_hcd and address 9 [ 667.600298] usb 1-2: device not accepting address 9, error -71

(ubuntu 8.04 on an eee pc 900)

When plugged into a windows machine, I get "device is not functioning correctly" or similar.

Is there anything else I can check before buying another one?

Many thanks :)

just as a bit of extra information, there are no ttyusbs in /dev, so there's definitely a communication error.

I don't really know the forum etiquette, but seeing as this has gone several pages into the history books, bump

Could somebody offer a suggestion please?