NEC POWERMATE VP Manual page 150

6-36 Adding Options
Align the notch on upgrade processor with the missing pin
5.
on the socket as shown in the figure and in accordance
with the instructions included in the upgrade kit.
CAUTION: Incorrect alignment of the
processor in the socket can damage the system
board processor.
After installing the processor, make sure the
processor jumper on the system board is set
properly for the new processor (see Chapter 7,
"Setting System Board Jumpers").
Carefully insert the processor into the socket.
6.
Aligning the processor