Apple Performa 6400/180 - Manual (Page 142)

Take Apart Logic Board - 45
Replacement Note:
Align
and insert the logic board
vertically so that it engages
the guides on the top and
bottom of the logic board
slot. Press the reset button,
and push on the vertical
logic board fence until it
snaps into place. Replace the
two screws.
Note:
Remove the DRAM
and high performance
module before returning the
board to Apple. Do
not
remove the ROM SIMM.