test the 4 pin cable with a ohm meter for continuity .
Also I'm curious what image are you using on your RPI? Are you using the DHCP one on first page? Or different?
Have tested the cable with a ohm meter, cable is fine.
Also with that cable not plugged in the converter the red light is on,
so asicminer-shop will send me a new Avalon USB Converter tomorrow.
I'm using the image with DHCP from the first page on my RPI.