No Osm Display - NEC MultiSync LCD1550V Service Manual

5. No OSM display

Check the output of pulse from U3 pin105 ~118 and pin 124 ~ 140
when press NEXT, ADJUST or CONTROL key.
NG
OK
Proceed section 9 "Checking the resolution
change IC movement"
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Printed wire broke between U3 pin105 ~ 118, 124 ~
140 and CN2, CN3.
6-9