This procedure locates the start of the failing RIO link.
The RIO node on one end of the link might be the failing item. If you were sent to this procedure as a result of a B7006985 SRC, and this is the only FRU in the FRU list, the system cannot see any I/O units on a RIO loop and there is at least one cable attached to a port on that loop. In this case, go to (B700) Reference codes and work from the full FRU list provided there.