LG LP-XG2 Owner's Manual page 19

How to use the Macintosh desktop adaptor
How to use the Macintosh desktop adaptor
How to use
a.
Usually set 1 ~ 6 to OFF status and 7 ~ 9 to ON status of the adjusting numbers. And select
the adjusting letter which is correct to the Macintosh and the monitor. (Refer to page 19.)
b. Notes for Connecting to the Macintosh PowerBook
If you get problems when connecting it to the projector, set the adjusting number 9 to OFF
status and restart the Macintosh PowerBook.
Adjusting letter
ON
1 2 3 4 5 6 7 8 9
Adjusting number
18