Apple Macintosh Performa 577 - Manual (Page 114)

Upgrades Macintosh Processor Upgrade - 22
Logic Board and
Upgrade Board
Returns
Return the upgrade and
logic boards to their original
conditions before sending
them to Apple. Be sure to
remove the upgrade board
from the logic board and
reinstall the 68LC040
processor on the logic board.
Replacement Caution:
To
avoid bending any pins when
removing the 68LC040
processor, pry up each side
only slightly.