FRU Replacement Strategy

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

   Note: Pressing down on the blue levers on the Model 90/95 processor board  does not fully seat the processor board into the system board connector.  To ensure that the processor board is fully seated, press down firmly on the middle  of the board until it is fully seated.

•  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 symptom change. Replace the FRU  that changed the symptoms.