Usually chips/ICs have a round mark on one side on the top so you know which way round is the correct position.

When inserting the new one look close that all pins are in the socket holes before slowly pressing it down. On new chips the pins are sometimes bent slighly more out or inwards.
I never did this on a 907ie but I guess it`s the same as on any other electronic device.
As many chips don`t like electrostatic charging you should earth yourself before touching the chip.
G.