2500 SX (25-4076)         Video Memory Upgrade         Faxback Doc. # 2487

Video Memory Upgrade Kit   Part# MX-3750 (available from National Parts)

Note: Your computer has 256 KB of video memory permanently installed on the
      main logic board. 

The video memory enables you to use the standard video modes and some Super
VGA modes. Use the Super VGA modes only with applications designed to
support them. Some Super VGA modes require a multiple-frequency monitor,
video drivers, or additional video memory.

To use the 640 x 480, 256-color graphics mode and the 1024 x 768, 16-color
graphics mode, you must increase the amount of video memory to 512 KB.

The 256 KB Video Memory Upgrade Kit (MX-3750) will upgrade the video memory
to 512 KB. This kit contains two 40-pin memory chips for the two video
memory chip sockets on the main logic board.  If you choose not to install
the kit yourself, a trained technician at a Radio Shack Service Center can
install it for you.

Caution: Incorrect installation of the video memory chips can damage the
         chips or your main logic board. Install the chips carefully.

Install the video memory upgrade kit as follows:

1. Open the computer case, then turn the computer so that the back of the
   computer faces you. This will allow you to reach the video sockets more
   easily.

2. Remove one chip from the antistatic packaging. Pin 1 of the chip is
   indicated by a dot and a notch on one end. The main logic board is
   labeled 1 at the Pin 1 end of the memory chip sockets.

3. Orient the memory chip so that the dot on the notched end of the chip
   aligns with the corner of the socket that is labeled 1.

4. Carefully press the memory chip into the socket. Be sure that the pins of
   the chip do not bend.

5. Repeat Steps 2 through 4 for the second memory chip.

When you restart the computer, it has 512 KB of video memory. The video
memory is not checked when diagnostics are performed at system startup.

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