IBM Z50 manual Important Service Information, FRU Replacement Strategy, Before Replacing Parts

Introduction

Important Service Information

Important

Software fixes are customer installable. Such fixes are located on the PC Company Bulletin Board Service (BBS). The direct line for modem connection is 919-557- 0001 or tieline 255-0001 (IBM internal phone number).

Advise customers to contact the PC Company HelpCenter at 800-722-2227 if they need assistance in obtaining or installing software fixes.

Customers in Canada should call IBM HelpPC at 800-565- 3344 for assistance or down-load information. The Canadian BBS phone numbers are:

Montreal 515-938-3022

Toronto 905-316-4255

Vancouver 604-664-6464

Winnipeg 204-934-2735

FRU Replacement Strategy

Before Replacing Parts

Ensure that all software fixes are installed prior to replacing any FRUs listed in this manual.

Use the following strategy to prevent unnecessary FRU replacement and service expense:

∙If you are instructed to replace a FRU and that does not correct the problem, reinstall the original FRU before you continue.

∙Some computers have both a processor board and a mainboard. If you are instructed to replace either the processor board or the mainboard, and the first board that you replaced does not correct the problem, reinstall the original board, and then replace the other (processor or system) board.

∙If an adapter or device consists of more than one FRU, an error code may be caused by any of the FRUs. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the faulty FRU.

© Copyright IBM Corp. 1998 vii