TITLE
    Macintosh Display Card 824 GC: Troubleshooting Screen Flicker
Article ID:
Author:
Created:
Modified: 		8813

9/27/91
9/27/91
TOPIC




    My Macintosh IIfx with a Macintosh Display Card 8*24 GC is having
    intermittent screen flicker. I've swapped out the Macintosh Display Card
    8*24 GC, the DRAM in the Display Card, the monitor, and the logic board.

DISCUSSION


    The flicker may be caused by the Macintosh Display Card 8*24 GC CDEV. Turn
    off the CDEV and restart the computer. If the flickering goes away, then
    the problem is related to software corruption or hardware/software
    incompatibility. This incompatibility can range to other hardware cards
    installed, especially other video cards made by third-party vendors, to
    incompatible software packages or other third-party INITs.

    With the Macintosh Display Card 8*24 GC CDEV turned off, the card acts just
    like a Macintosh Display Card 8*24. If the flickering still occurs, you
    may be encountering an environment issue related to EMF (electromagnetic
    interference).


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