ThinkPad R30/R31 Hardware Maintenance Manual
Introduction
Important Service Information
Important
Diskette fixes are
Advise customers to contact the IBM® HelpCenter® at
Customers in Canada should call IBM® HelpCenter® at
FRU Replacement Strategy
Before Replacing Parts
Ensure that all diskette fixes are installed prior to replacing any FRUs listed in this manual.
Use the following strategy to prevent unnecessary FRU replacement and service expense:
vIf you are instructed to replace a FRU and that does not correct the problem, reinstall the original FRU before you continue.
vSome computers have both a processor board and a system board. If you are instructed to replace either the processor board or the system board, and the first board that you replaced does not correct the problem, reinstall the original board, then replace the other (processor or system) board.
vIf 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 FRU that changed the symptoms.
vR31 : When CPU is replaced, the heat sink should be replaced with new one also.
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