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Troubleshooting Symptom Charts/Video - 6
Video
No video, fan is
running
1 Check monitor connection.
2 Try known-good monitor.
3 Remove all DRAM DIMMs and try replacing them one at a
time to test. Replace any bad DIMMs.
4 Replace logic board. Retain customer’s DIMMs.
5 Replace power supply.
After restarting, two
connected monitors,
used for video
mirroring, appear
black or gray
Note:
This issue only affects early European Power Macintosh
4400 systems.
Unplug monitor cable connected to PCI video card and restart.
Or, if user wants to continue video mirroring, instruct to turn off
video mirroring in Monitors & Sounds control panel before
shutting down or restarting. Turn video mirroring on after
starting computer.