just got my nano today, plugged it in, installed drivers ok. Compiling and running was working fine.
Tried to connect an LED then it started to act funny, now the TX/RX either blink on/off or stay on for ages then go off and then L starts blinking furiously.
Getting USB device not recognised errors and can't reinstall the FTDI drivers (XP).
Now when I connect and look at the Properties for the USB device it comes up with PID_0000 and VID_0000.
Thinking maybe I've lost the bootloader somehow or fried the USB chip .... or I'm a n00b.