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.