NEC MultiSync LCD1700NX A Service Manual page 76

TROUBLE SHOOTING
TABLE OF CONTENTS
Page
1. No Display on Screen (Screen is Black, LED is Amber) -------------------------------------- 6-2
2. No Display on Screen (Screen is Black, LED is Green) --------------------------------------- 6-3
3. Checking the Back Light Unit ------------------------------------------------------------------------ 6-6
4. Abnormal Screen ---------------------------------------------------------------------------------------- 6-7
5. No OSM Display ----------------------------------------------------------------------------------------- 6-10
5.1 No OSM Display --------------------------------------------------------------------------------------- 6-10
5.2 OSM Adjust Problem --------------------------------------------------------------------------------- 6-10
6. Abnormal Plug and Play Operation ----------------------------------------------------------------- 6-11
7. Checking the Sync Signal Interface Circuit ------------------------------------------------------- 6-12
7.1 Checking the Horizontal Sync Pulse Control Circuit ------------------------------------------ 6-12
7.2 Checking the Vertical Sync Pulse Control Circuit ---------------------------------------------- 6-12
8. Checking the IC Resolution Change Movement ------------------------------------------------- 6-13
9. No Power On --------------------------------------------------------------------------------------------- 6-14
10. Checking the DC/DC Converter Circuit ---------------------------------------------------------- 6-15
11. Checking the CPU Operation ----------------------------------------------------------------------- 6-16
6-1