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

Use the following table to determine your starting point.

Symptom	Action
Service Actions
You have parts to exchange or a corrective	1. Go to Chapter 7, “Removal and
action to perform.	Replacement Procedures” on page 7-1.
	2. Go to "MAP 0410: Repair Checkout		" in the
	Diagnostics Information for Multiple Bus
	Systems.
You need to verify that a part exchange or	Go to "MAP 0410: Repair Checkout		" in the
corrective action corrected the problem.	Diagnostics Information for Multiple Bus
	Systems.
You need to verify correct system operation.	Go to "MAP 0410: Repair Checkout		" in the
	Diagnostics Information for Multiple Bus
	Systems.
System Stops or hangs with alternating numbers displayed in the Operator Panel display.
The Operator Panel display alternates between	Record both codes. Go to the entry for "E1FD"
the code "E1FD" and another "Exxx" code.	on page 3-23.
The Operator Panel display alternates between	Record the error codes. Go to the entry for
the codes "E1DE" and "E1AD".	"E1DE" on page 3-21,
System Stops with an Error or Checkpoint Code Displayed
The system stops with an 8-digit error code	Record the error code. Go to Chapter 3, “Error
starting with the number "2" displayed on the	Code to FRU Index” on page 3-1.
system console.
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 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 characters "FF" or "E" is	three digits of the 4-digit number displayed, then
displayed in the operator panel display.	go to the "Fast Path MAP" in the	Diagnostics
	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 number
	displayed, then go to the "Fast Path MAP" in
	Diagnostics Information for Multiple Bus
	Systems.

2-27046 Model B50 Service Guide