IBM H SERIES RS/6000 - Manual (Page 230)

Problem Determination When Unable to Load Diagnostics
Use this procedure to obtain an error code. The service organization uses the error
code to determine which field replaceable units (FRUs) are needed to restore the
system to correct operation.
Step 1. Considerations before Running This Procedure
The diagnostics can use a display connected to the video port or a ASCII terminal
attached to a serial port.
Go to “Step 2.”
Step 2
Are the Online Diagnostics installed on this system?
NO Go to “Step 4.”
YES Go to “Step 3.”
9-10 RS/6000 Enterprise Server Model H Series User's Guide