No
Yes
No
No
BT30V,
SUB9V
SUB5V
OK?
Did this
fix the
problem?
Yes
Problem Solved
Try using a different video input source.
Try the Tuner, Component, S-Video or
HDMI input.
Check for the BT 30V, SUB 9V, &,
SUB5V sources on connector AP3
of the AP board. Refer to Slide 45 for test
point locations.
Check the video input connections and
termination points for a possible cold
solder joint or connection problem.
Does any
input
work?
Replace the A
Board.
Continued on next
page
Replace defective Regulator and
biasing components. Refer the
power distribution diagram on Slide
21.
Yes
No Video, Dark Blue Screen
55
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