IBM RS/6000 7043 43P Series, User Manual, Page: 160 / 322

12. The new PowerPC 604e microprocessor is mounted on a small circuit board with
an array of connector pins underneath. The pin array has one missing pin at
one corner so that the PowerPC 604e microprocessor can only be installed in
one direction. The processor side of the circuit board is keyed with a small white
dot that indicates the corner with the missing pin.
The processor socket on the planar is keyed with a matching missing female
socket, as shown in the diagram below. Take care to ensure you have aligned
the new processor correctly.
The PowerPC 604e microprocessor does not require any force when you plug it
into the socket. Take care not to bend or break the pins on the processor board.
13. Place the new PowerPC 604e microprocessor into position on the processor
socket. Make sure that all of the pins are seated correctly and that no pin holes
are visible. Lower the socket lever to lock the processor in place, making sure
that the locking tab is visible.
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7043 43P Series User's Guide