Apple MacBook Pro 17-inch (original, Core 2 Duo, 2.4GHz, Late 2007 CTO, Early 2008, and Late 2008) - Manual (Page 127)

MacBook Pro 17-inch (original, Core 2 Duo, 2.4/2.6GHz, 2008) Take Apart — Logic Board 127
Note the lip on the right speaker that overhangs the logic board. Be sure to lift the assembly 6.
with the speaker before separating to keep the logic board from bending.
Support the assembly as it lifts, and pivot up and away from the ports as you finesse it clear 7.
of the port openings. (Unlike the photo below, keep the speaker attached to the assembly.)
After lifting the logic board clear of the bottom case, separate the speaker from the logic 8.
board by sliding it directly down to clear the lip on the speaker enclosure. Remove assembly.