I started having the dreaded flashing yellow light yesterday and could not use my scanner. I called scansnap and it ended up being the USB3 cable that came with the printer (or possibly the apple usb2-usb3 dongle that i need to use to attache to my new(ish) macbook pro. i switched out the usb3 cord that came with the scanner with a standard printer usb2 to usb3 cord and life was good again. the technician said it could have been software issue too because i had not been shutting off my scanner by closing the cover before disconnecting the usb cord from my MacBook pro.....who knows, but it is working now. phew.