This is the back of the G104D sense inhibit board from the MM8-E 4kx12 core memory option. In the center of the board you can see that the board has been discolored somewhat from the heat of the power resistors on the front (1.3M) of the board. Not all the G104 boards in the machine have the discoloration so it may have had poor airflow at some point or been moved from a different machine.
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