I was going through the ShiftOut tutorials using a 595 chip and leds. Had everything wired up, code uploaded, and plugged in to USB.
Nothing happened. Noticed that my IC was in upside down, so without unplugging the USB power supply, i decided to remove the IC, and put it back in right-side up.
Upon putting it properly, there was a flash of LED's, followed by a beep on my computer (signifying that a USB device was no longer plugged in).
There must've been a surge that ruined a chip (power transistor?). Are these replacable?
I haven't yet tried to see if the board powers up using the other power supply (will buy one today).