IBM B50 manual Post

Symptom		Action
The system stops and POST indicators are		Go to “MAP 1540: Minimum Configuration” on
displayed on the system console. The term		page 2-17.to isolate the problem.
"POST indicators" refer to the icons (graphic
display) or device mnemonics (ASCII terminal)
that appear during the power-on self-test
(POST).
The system stops and the message "STARTING		Go to “Firmware Checkpoints” on page 3-14.
SOFTWARE PLEASE WAIT..." is displayed on
the ASCII terminal, or the boot indicator
(	) is displayed on a graphics terminal.
The system does not respond to the password		Verify that the password is being entered from a
being entered, or the system login prompt is		keyboard or ASCII terminal defined as the
displayed when booting in service mode.		system console. If so, then the keyboard or its
		controller may be faulty.
		If the password is being entered from a
		keyboard attached to the system, replace
		the keyboard. If that does not fix the
		problem, replace the system board (see
		note 3 on page 2-1).
		If the password is being entered from an
		ASCII terminal, use the Problem
		Determination Procedures for the ASCII
		terminal. Make sure the ASCII terminal is
		connected to Serial Port 1. Replace the
		system board if these procedures do not
		reveal a problem (see note 3 on page 2-1).
No codes are displayed on the operator panel		Reseat the operator panel cable. If the problem
within a few seconds of turning on the system.		is not resolved, replace these parts in the
The operator panel is blank before the system is		following order:
powered on.		1. Operator Panel Assembly. Update the VPD
		information in the new operator panel.
		2. System board (see note 3 on page 2-1).
The power LED on the operator panel comes on		Automatic power-up is a feature on the Model
and the system powers on automatically when		B50. Refer to the System Board Jumper
A/C power is applied.		Settings in Chapter 1 for the correct settings. If
		the jumper is set in the disabled position,
		replace the system board (see note 3 on page
		2-1).
The SMS configuration list or Boot sequence		A device may be set to use the same SCSI bus
selection menu shows more SCSI devices		ID as the control adapter. Note the ID being
attached to a controller/adapter than are actually		used by the controller/adapter (this can be
attached.		checked and/or changed via an SMS utility), and
		verify that no device attached to the controller is
		set to use that ID. If settings do not appear to
		be in conflict, go to “Boot Problems or
		Concerns” on page 3-27.

2-47046 Model B50 Service Guide