v Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 3, “Parts listing, Type 8406,” on page 229 to determine which components are CRUs and whichcomponents are FRUs.v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.IsolationProcedure Code Symptom ActionFSPSP51 Runtime diagnosticshas detected amemory buscorrectable error thatis exceedingthreshold. Thememory buscorrectable error doesnot threaten thesystem operation atthe moment.However, the systemis operating underdegraded mode.Replace the CRU called out after this FSPSP call. If the CRU that iscalled out is a DIMM CRU, perform the following procedure:1. Replace both memory DIMMs of the pair on the microprocessor thatcontains the failing CRU:DIMM 1 (Px-C1)For P1-C1, replace DIMMs 1 and 3; for P2-C1, replaceDIMMs 9 and 11.DIMM 2 (Px-C2)Replace DIMMs 2 and 4, or DIMMs 10 and 12.DIMM 3 (Px-C3)Replace DIMMs 1 and 3, or DIMMs 9 and 11.DIMM 4 (Px-C4)Replace DIMMs 2 and 4, or DIMMs 10 and 12.DIMM 5 (Px-C5)Replace DIMMs 5 and 7, or DIMMs 13 and 15.DIMM 6 (Px-C6)Replace DIMMs 6 and 8, or DIMMs 14 and 16.DIMM 7 (Px-C7)Replace DIMMs 5 and 7, or DIMMs 13 and 15.DIMM 8 (Px-C8)Replace DIMMs 6 and 8, or DIMMs 14 and 16.2. See “Removing a memory module” on page 244 for locationinformation and the removal procedure.3. Install new memory DIMMs, as described in “Installing a memorymodule” on page 245.See “Supported DIMMs” on page 4 for more information.FSPSP53 A network error hasoccurred between theservice processor andthe network switchon the blade server.Replace the system board and chassis assembly, as described in“Replacing the FRU system-board and chassis assembly” on page 260.210 Power Systems: Problem Determination and Service Guide for the IBM Power PS700 (8406-70Y)