NorthStar 958 Installation Manual page 40

SECTION SEVEN: Troubleshooting and servicing the 958 system
TABLE 11: Troubleshooting the 958 installation (cont.)
Problem Area Symptom
•
DISPLAY (cont.)
•
•
SYSTEM Hardware-related:
System lock-ups
•
•
•
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The display screen dims, either slightly
or more, after the 958 has been on for a
certain time.
8117 FAILURE
The message
where the video input image should be.
Color bars appear where the video
overlay image should be.
The system locks up on a random basis
with no apparent pattern.
The system locks up when using a chart
card.
System fails any initial self-tests.
Possible Solutions/Reasons
•
The 958 may be going into auto-dim-
ming mode. Auto-dimming helps
maintain the integrity of the display
and reduce power consumption when
the 958 is on and running too hot for
its current environment. In this case,
the display screen may automatically
dim.
• The internal 8117 video chip has
appears
failed; contact the Northstar Service
Department. (This failure affects only
the video image, nothing else.)
• Check that the video image is turned
on (press
VIDEO SETUP
•
Check the cables and the connectors.
•
Check that the video equipment is
working properly.
• Possible internal failure; call your
Northstar dealer or the Northstar Ser-
vice Department.
•
Possible bad chart card. Remove the
card, and inspect the pin area of the
card and the 958 for damage. If the
pins in the 958 are bent or damaged,
to prevent further damage, don't
insert another card. If you're sure the
card pins aren't bent, try inserting a
new card (turn power off before
inserting).
• Possible internal failure; call your
Northstar dealer or the Northstar Ser-
vice Department.
958 Installation Manual, Rev. A1
STAR
to display the
screen).