Page 1
K
Service Source
Video Cards
Page 2
K
Service Source
Troubleshooting
Video Cards
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Troubleshooting General/ - 1
General
The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)
If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.
For additional assistance, contact Apple Technical Support.
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Troubleshooting Symptom Charts/Video - 2
Symptom Charts
Video
Dark screen, bright
screen without
recognizable
information; or other
video problems
1 Reseat video card.
2 Reseat RAM or VRAM SIMM on video card.
3 Check cable connections.
4 Run video diagnostic tests.
5 Replace VRAM or DRAM (if socketed).
6 Replace video card.
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K
Service Source
Upgrades
Video Cards
Page 6
Upgrades Video Card Upgrade - 1
Video Card Upgrade
Before you begin, remove
the video card.
The Macintosh II Video Card
upgrade requires 8 video
RAM chips.
Note:
The required RAM
chips are not available in an
“upgrade kit.” You must
order the chips separately.
The upgrade supports 8 bits
per pixel and up to 256
colors or shades of gray.
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Upgrades Video Card Upgrade - 2
Caution:
precautions in Bulletins/
Safety.
Install the eight video RAM
chips in locations B1, C1,
D1, E1, G1, H1, G2, and H2
on the video card.
Note:
each RAM chip should face
the DB-15 connector on the
rear of the card.
Review the ESD
The notch at the end of
Page 8
Upgrades Two-Page Card Upgrade - 3
Two-Page Card Upgrade
Before you begin, remove
the video card.
The Two-Page Monochrome
Video Card upgrade requires
8 video RAM chips.
Note:
The required RAM
chips are not available in an
“upgrade kit.” You must
order the chips separately.
The upgrade supports 4 bits
per pixel and up to 16
shades of gray.
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Upgrades Two-Page Card Upgrade - 4
Expansion Slot
Connector
Caution:
Review the ESD
precautions in Bulletins/
Safety.
Install the eight video RAM
chips in locations D1
through D8 on the video
card.
Note:
The notch at the end of
each RAM chip should face
the expansion slot connector
on the bottom of the card.
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Upgrades Portrait Card Upgrade - 5
Portrait Card Upgrade
Before you begin, remove
the video card.
The Portrait Video Card
upgrade requires 8 video
RAM chips.
Note:
The required RAM
chips are not available in an
“upgrade kit.” You must
order the chips separately.
The upgrade supports 4 bits
per pixel and up to 16
shades of gray.
Page 11
Upgrades Portrait Card Upgrade - 6
Expansion Slot
Connector
Caution:
Review the ESD
precautions in Bulletins/
Safety.
Install the eight video RAM
chips in locations D1
through D8 on the video
card.
Note:
The notch at the end of
each RAM chip should face
the expansion slot connector
on the bottom of the card.
Page 12
Upgrades Hi-Res Display Card Upgrade - 7
Hi-Res Display Card Upgrade
Before you begin, remove
the video card.
The Hi-Resolution Display
Video Card upgrade requires
8 video RAM chips.
Note:
The required RAM
chips are not available in an
“upgrade kit.” You must
order the chips separately.
The upgrade supports 8 bits
per pixel and up to 256
colors or shades of gray.
Page 13
Upgrades Hi-Res Display Card Upgrade - 8
C1-C8
Expansion Slot
Connector
Caution:
Review the ESD
precautions in Bulletins/
Safety.
Install the eight video RAM
chips in locations C1
through C8 on the video
card.
Note:
The notch at the end of
each RAM chip should face
the expansion slot connector
on the bottom of the card.
Page 14
Upgrades 4•8 Card Upgrade - 9
4•8 Card Upgrade
Before you begin, remove
the video card.
The Macintosh Display Card
4•8 upgrade requires two
VRAM SIMMs.
The upgrade supports
• 24-bit performance
with 1 MB of video RAM
• 16.7 million true-color
scale on the AppleColor
High-Resolution RGB
Monitor
Page 15
Upgrades 4•8 Card Upgrade - 10
• 256 gray levels on the
Apple High-Resolution
Monochrome Monitor,
the Two-Page
Monochrome Monitor,
VRAM SIMM 1
and the Macintosh
Portrait Display
VRAM SIMM 2
Caution:
Review the ESD
precautions in Bulletins/
Safety.
Install the two VRAM SIMMs
in the socket locations on the
video card.
Page 16
Upgrades 8•24GC Card Upgrade - 11
8•24GC Card Upgrade
Before you begin, remove
the video card.
The Macintosh Display Card
8•24GC upgrade requires
two DRAM SIMMs.
The upgraded card improves
the performance of
applications that use larger
off-screen bitmaps and
other imaging techniques.
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Upgrades 8•24GC Card Upgrade - 12
DRAM SIMM 2
DRAM SIMM 1
Caution:
Review the ESD
precautions in Bulletins/
Safety.
Install the two video DRAM
SIMMs in the socket
locations on the video card.
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