| Step 9| (from step 3 on page 2-2330-3)|  If the Fibre-Optic Extender is plugged into an SSA adapter, observe the green light| that is next to the connector on the adapter.|  If the Fibre-Optic Extender is not plugged into an SSA adapter, observe the Ready| light of the first disk drive module on the string to which the Fibre-Optic Extender is| connected.| Is the Ready light on continuously?| NO| Go to step 11 on page 2-2330-13.| YES| Go to step 10.| Step 10| (from step 9)| The device is receiving SSA signals correctly.| Have you checked both ends of the optical link?| NO| 1. Find the Fibre-Optic Extender that is at the other end of the link.| 2. Go to step 2 on page 2-2330-3.| YES| No trouble found with this link.2-2330-12 7133 Service Guide

IBM 7133 Series Service Manual