Before you begin, familiarize yourself with the Take Apart section of
Technical Procedures--especially those sections pertaining to safety and
Electrostatic Discharge prevention.
When upgrading the Video RAM (VRAM) of the Macintosh LC, it is important
to refer to the note on page 1.2 of the Technical Procedures for the
Macintosh Family (Volume Two, Macintosh LC tab), which states that the
512K VRAM SIMM replaces rather than augments the 256K VRAM SIMM on the
logic board.
For identification of which SIMM is the VRAM SIMM, you are encouraged to
refer to the illustration in the same binder on page 1.4 or the
illustrated parts list on page IPL.2, item number 21. The VRAM SIMM is
located on the logic board immediately next to the system RAM SIMM
connectors. The VRAM differs from system RAM by using a physically larger
SIMM connector and more and denser signal leads.
The RAM exchange would be identical to the Macintosh Display Card Upgrade
procedure (refer to page 2.10 of the Macintosh Family Cards tab in the
Macintosh Family Technical Procedures, Volume Four), except that only one
VRAM SIMM is required.