Chapter 6. Loading the System DiagnosticsThe system diagnostics can be booted using either the default boot list or thecustomized service mode boot list. (The service mode boot list can be modified usingthe system diagnostics ″Display or Change Bootlist″ service aid. The service mode bootlist cannot be modified under the System Management Services.)Performing Slow BootTo fully analyze all of the available information, perform the following steps before doinga hardware repair or replacement, especially if the error is related to the CPU ormemory:1. Record the 8-character error code (and location code if present) displayed in theoperator panel, or that was reported by the customer.2. Do a slow-mode boot in service mode. This can be specified using the SystemPower Control Menu on the service processor main menu. (A fast-mode boot skipsmuch of the built-in diagnostic testing.) A slow-mode boot may yield a new8-character error code on the operator panel and new errors in the serviceprocessor error log. If a new error code is reported, use it in subsequent steps tocontinue problem analysis.Loading Standalone DiagnosticsTo load Standalone Diagnostics using the default boot list, perform the followingprocedure:1. Verify with the system administrator and users that all programs may be stopped,then do so.2. Turn off the system.3. Wait 30 seconds, and turn on the system.4. Immediately insert the diagnostic CD-ROM into the CD-ROM drive.5. After the keyboard indicator appears during startup, and before the tone sounds,press the F5 key on a directly attached keyboard (or the number 5 key on an ASCIIterminal).6. Enter any requested passwords.Loading Online DiagnosticsOnline Diagnostics can be loaded by booting using the customized service mode bootlist by pressing the F6 key (on a directly attached keyboard) or the number 6 key on anASCII terminal.The procedure for booting from the devices listed in the service mode boot list (OnlineDiagnostics) is the following:1. Verify with the system administrator and users that all programs may be stopped,then do so.181
