Step 1520-12Shut down the system and remove all power cables from the rear of the system.Exchange the following FRUs in the order listed:1. Power supply.2. Power cables to system board.3. System board.4. Power backplane.Restart the system and perform error log analysis.Do you get an SRN indicating a voltage sensor is out of range?NO The last FRU exchanged is defective. Go to ″MAP 0410: Repair Checkout″ intheRS/6000 EserverpSeries Diagnostic Information for Multiple BusSystems.YES Reinstall the original FRU.Repeat the FRU replacement steps until a defective FRU is identified or all theFRUs have been exchanged.If the symptom did not change and all FRUs have been exchanged, go to“Step 1520-13”.If the symptom has changed, check for loose cards, cables, and obviousproblems. If you do not find a problem, return to “Step 1520-1” on page 50 inthis MAP, and follow the instructions for the new symptom.Step 1520-13Check that the power outlet is properly wired and is providing the correct voltage.Did you find a problem?NO Go to “Step 1540-1” on page 60.YES Correct the problem. Go to ″MAP 0410: Repair Checkout″ in theRS/6000EserverpSeries Diagnostic Information for Multiple Bus Systems.56 Service Guide
