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			<title>Macintosh Display Card 824 GC: Troubleshooting Screen Flicker</title><body class="ac-gn-current-support">
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<h1 id="main-title">Macintosh Display Card 824 GC: Troubleshooting Screen Flicker</h1>
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<div id="intro-container"><div class="truncate"><div class="attr SYMPTOMS"><div class="attr TOPIC"><FONT SIZE=4><BR>
<BR>
My Macintosh IIfx with a Macintosh Display Card 8*24 GC is having<BR>
intermittent screen flicker.  I've swapped out the Macintosh Display Card<BR>
8*24 GC, the DRAM in the Display Card, the monitor, and the logic board.<BR>
<BR>
</FONT></div></div> <!--  attr Symptom  --></div> <!--  truncate --></div> <!--  intro-container --><div class="clear"> </div>
 </div>   <!-- abstract end -->
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  <div class="attr SUMMARY">
The flicker may be caused by the Macintosh Display Card 8*24 GC CDEV.  Turn<BR>
off the CDEV and restart the computer.  If the flickering goes away, then<BR>
the problem is related to software corruption or hardware/software<BR>
incompatibility.  This incompatibility can range to other hardware cards<BR>
installed, especially other video cards made by third-party vendors, to<BR>
incompatible software packages or other third-party INITs.<BR>
<BR>
With the Macintosh Display Card 8*24 GC CDEV turned off, the card acts just<BR>
like a Macintosh Display Card 8*24.  If the flickering still occurs, you<BR>
may be encountering an environment issue related to EMF (electromagnetic<BR>
interference).<BR>
<BR>
<BR></div>
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<div class="mod-date">Published Date: Feb 18, 2012</div>
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