Important Service InformationImportantDiskette fixes are customer installable. The diskettefixes are located on the PC Company Bulletin BoardService (BBS). The direct phone line for modemconnection is 919-557-0001 or tieline 255-0001.Advise customers to contact the PC CompanyHelpCenter at 800-772-2227 if they need assistance inobtaining or installing any diskette fixes.Customers in Canada should call IBM HelpPC at800-565-3344 for assistance or down-load information.The Canadian BBS phone numbers are:Montreal 514-938-3022Toronto 905-316-4255Vancouver 604-664-6464Winnipeg 204-934-2735FRU Replacement StrategyBefore Replacing PartsEnsure that all diskette fixes are installed prior toreplacing any FRUs listed in this manual.Use the following strategy to prevent unnecessary FRUreplacement and service expense: If you are instructed to replace a FRU and thatdoes not correct the problem, reinstall the originalFRU before you continue. Some computers have both a processor board and asystem board. If you are instructed to replace eitherthe processor board or the system board, and the firstboard that you replaced does not correct the problem,reinstall the original board, then replace the other(processor or system) board. If an adapter or device consists of more than oneFRU, an error code may be caused by any of theFRUs. Before replacing the adapter or device,remove the FRUs, one by one, to see if thesymptoms change. Replace only the FRU thatchanged the symptoms.Warning: A customized setup configuration (other thandefault settings) may exist on the computer you areservicing. Running Automatic Configuration may alterthose settings. Note the current configuration settings(using the View Configuration option) and verify that thesettings are in place when service is complete.Introduction 5