NEC MultiSync LCD1525V Service Manual page 66

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Check the 3.3 V power are supplied on I103 pin 2.
NG
Check if the voltage on I103 pin3
OK
that is high level DC at 5V.
Is a dot clock being outputted under the
condition that a LCD module is connected to
P305 pin 44?
NG
OK
Check the H-sync pulse of negative polarity
is output on P305 pin 38 at TTL level.
NG
OK
Check the V-sync of negative polarity are
output on P305 pin 40.
NG
OK
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NG
OK
Failure point
I103 Failure
6-4
1) Printed wire broke between I102 and I103
2) I102 failure.
Failure point
1) I401 failure
2) Printed wire broke between I401 and P305 pin 44.
Failure point
1) I401 failure
2) Printed wire broke between I401 and P305 pin 38.
Failure point
1) I401 failure
2) Printed wire broke between I401 and P305 pin 40.
Failure point