The Power MAP deals with isolation of components to diagnose a power problem. Thenature of power problems can be related to powering up and down the system, orpower failures that occur after power is turned on.The Minimum Configuration MAP is used to locate defective components not found bynormal diagnostics or error-isolation methods. This MAP provides a systematic methodof isolation to the failing item or items.CheckpointsModel 270 servers use various types of checkpoints, error codes, and SRNs, which arereferred to throughout this book (primarily in Chapter 4, “Checkpoints”, on page 71,Chapter 5, “Error Code to FRU Index”, on page 93, Chapter 6, “Loading the SystemDiagnostics”, on page 147, and Chapter 10, “Parts Information”, on page 271). Thesecodes may appear in the service processor boot progress log, the AIX error log, and theoperator panel display. Understanding the definition and relationships of these codes isimportant to the service personnel who are installing or maintaining Model 270 servers.Codes that can appear on the operator panel or in error logs are as follows:CheckpointsCheckpoints display in the operator panel from the time ac power is connectedto the system until the AIX login prompt is displayed after a successfuloperating system boot. These checkpoints have the following forms:E000 - E075These checkpoints display from the time ac power is connected to thesystem until the OK prompt displays on the operator panel display.During this time, the service processor performs self-test and NVRAMinitialization.E0A0 - E0E1When power up is initiated, the service processor starts built-inself-test (BIST) on the central electronics complex (CEC). VPD dataare read.E0E2 - E2xxThis range indicates that the system processor is in control and isinitializing system resources.E3xx These codes indicate that the system processor is running memorytests.E1xx The system firmware attempts to boot from devices in the boot list.Control is passed to AIX when E105 (normal mode boot) or E15B(service mode boot) displays on the operator panel display.0xxx 0xxx codes are AIX checkpoints and configuration codes. Locationcodes may also be shown on the operator panel display during thistime.22 Service Guide
