No Osm Display; Osm Adjust Problem - NEC MultiSync LCD1700NX A Service Manual

5. No OSM Display

5.1 No OSM Display
Check the input of 3.3Vp-p pulse from I315 pin P3, P4, R1, R2, P2, P1.
NG
OK
Process "Checking the IC Resolution Change Movement" section.

5.2 OSM Adjust Problem

Check the input TTL level whether was changed when pressed function keys.
NG
OK
Process "Checking the IC Resolution Change Movement" section.
1) Printed wire broke between I315 pin P3 and I302 pin 5.
2) Printed wire broke between I315 pin P4 and I302 pin 4.
3) Printed wire broke between I315 pin R1 and I302 pin 3.
4) Printed wire broke between I315 pin R2 and I302 pin 2.
5) Printed wire broke between I315 pin P2 and I302 pin 7.
6) Printed wire broke between I315 pin P1 and I302 pin 6.
7) RN301, RN303 open/shot.
1) Printed wire broke between P302 pin 3 and I302 pin 15.
2) Printed wire broke between P302 pin 4 and I315 pin G19.
3) Printed wire broke between P302 pin 5 and I315 pin G18.
4) Printed wire broke between P302 pin 6 and I315 pin L1.
5) Printed wire broke between P302 pin 7 and I315 pin M1.
6) C322, C323, C324, C326, C327 short.
7) RN306, RN307 open/shot.
8) I315 failure.
Failure point
Failure point
6-10