Disconnect
the
Display signal cable at
the
rear
of
the System
Unit. Press
!9
B (Video Test), and
~
(Enter).
Selecting the Video Test will place a signal
on
pins 3, 4, 5, and
6
of
the
9 pin connector
of
between 2.4 and 5.5 V dc.
At
the
phono-jack connector,
the
voltage between the two test points
should be 1.2 and 2.5 V dc. Measure the voltages present on
pins 3, 4, 5, and 6
of
the
9 pin connector and
the
voltage
between the center and outer edge
of
the
phono-jack .
•
o
WERE YOU ABLE TO READ THE PROPER VOLTAGES?
NO Replace
your
Color/Graphics Monitor Adapter. See
Section 3, "Removal/Replacement."
YES
500-21
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