IBM B50 manual Symptom, Diagnostics, Information for Multiple Bus Systems, Action

Symptom	Action
The system login prompt is displayed.	You may not have pressed the correct key, or
	you may not have pressed the key soon enough
	when you were to indicate a Service Mode IPL
	of the diagnostic programs. If this is the case,
	start over at the beginning of this Step.
	Note:	Perform the system shutdown procedure
		before turning off the system.
	If you are sure you pressed the correct key in a
	timely manner, go to “Step 1020-2” on
	page 2-8.
The system does not respond when the	Go to “Step 1020-2” on page 2-8.
password is entered.
The system stopped. A POST indicator is	Go to “MAP 1540: Minimum Configuration” on
displayed on the system console and	page 2-17.
an eight-digit error code is not displayed on
the system console.
a four-digit error code is not displayed on
the operator panel.
a three-digit error code is not displayed on
the operator panel.
The system stops and an 8-digit error code	Record the error code. Go to Chapter 3, “Error
starting with the number "2" displayed.	Code to FRU Index” on page 3-1.
The system stops and a 4-digit number	Go to “MAP 1540: Minimum Configuration” on
beginning with the characters "FF" is displayed	page	2-17.
in the operator panel display.
The system stops and a 4-digit number	Record the error code. Go to “Firmware
beginning with the character "E" is displayed in	Checkpoints” on page 3-14.
the operator panel display.
The system stops and a 4-digit number not	Record SRN 101-xxx, where xxx is the last
beginning with the	three digits of the four digit number displayed.
characters "FF" or "E" is displayed in the	Then go to the "Fast Path MAP" in		Diagnostics
operator panel display.	Information for Multiple Bus Systems.
The system stops and a 3-digit number is	If the number is 000, 185 or 888, go to “MAP
displayed in the operator panel display.	1540: Minimum Configuration” on page 2-17.
	Record SRN 101-xxx, where xxx is the three
	digits displayed. Then go to the "Fast Path
	MAP" in Diagnostics Information for Multiple Bus
	Systems.
The System Management Services application	Go to sub-step 3 in “Step 1020-3” on page 2-8.
appears on the screen.
All other symptoms.	If you were directed here from the Entry MAP,
	go to “MAP 1540: Minimum Configuration” on
	page 2-17.Otherwise, find the symptom in the
	“Entry MAP” on page 2-1.

Chapter 2. Maintenance Analysis Procedures (MAPs) 2-7