Step 3(from step 2 on page 2-2030-1)1. Disconnect both MAIN using-system power-control cables from connectors J3 and J4of the remote-power-on control unit.2. Observe all the fan-and-power-supply assemblies that are present in the 7133.Does at least one Fan-and-Power Check light remain on?NO 1. Reconnect the MAIN using-system power-control cables to theremote-power-on control unit.2. Go to step 5 on page 2-2030-4.YES 1. Reconnect the MAIN using-system power-control cables to theremote-power-on control unit.2. Go to step 4 on page 2-2030-3.2-2030-2 7133 Service Guide

IBM 7133 Series Service Manual