6-1
TROUBLE SHOOTING
TABLE OF CONTENTS
Page
1. Power is not available .......................................................................................................... 6-2
2. No image display ................................................................................................................. 6-3
2.1 LED light, but no OSD, no back light and no image .......................................................... 6-3
2.2 LED green, and no OSD and no back light ........................................................................ 6-4
2.3 LED green, and OSD present, but no image ..................................................................... 6-5
3. Picture errors ....................................................................................................................... 6-6
3.1 High-light in white or black ............................................................................................... 6-6
3.2 Image is unclear ................................................................................................................. 6-7
3.3 Image noise ....................................................................................................................... 6-8
4. Others operational error ....................................................................................................... 6-9
4.1 DDC read error .................................................................................................................. 6-9
4.2 Back light malfunction ........................................................................................................ 6-9
5. Switching power circuit failure ........................................................................................... 6-10
Prior to the diagnostic servicing for troubleshooting, the following items should be examined to
confirm the freedom from abnormality:
(1) Power supply voltage: 100 to 240VAC
(2) Input signal: 1280 x 1024 (60Hz), recommended (Separate)
A: Analog D-SUB input
RGB 0.7Vp-p (when terminated with 75
Ω
)
Display pattern
Display not in black
(3) All connectors shall be correctly connected in the unit.
< Explanations below are based on the analog D-SUB input.>
Note
Summary of Contents for LCD1920NX BK - MultiSync - 19" LCD Monitor
Page 4: ...1 1 USER S MANUAL 1 A Version MultiSync LCD1920NX TM ...
Page 49: ...3 6 SYMBOL CODE DESCRIPTION 15 79PZ0004 LCD MODULE 19 0 TFT FLC4 15 ...
Page 100: ...7 9 2 4 3 Circuit diagram ...
Page 172: ...MODEL LCD1920NX LCD MAIN BD 1 7 SCHEMATIC DIAGRAM 10 1 Schematic Diagram ...
Page 173: ...MODEL LCD1920NX LCD MAIN BD 2 7 SCHEMATIC DIAGRAM 10 2 ...
Page 174: ...MODEL LCD1920NX LCD MAIN BD 3 7 SCHEMATIC DIAGRAM 10 3 ...
Page 175: ...MODEL LCD1920NX LCD MAIN BD 4 7 SCHEMATIC DIAGRAM 10 4 ...
Page 176: ...MODEL LCD1920NX LCD MAIN BD 5 7 SCHEMATIC DIAGRAM 10 5 ...
Page 177: ...MODEL LCD1920NX LCD MAIN BD 6 7 SCHEMATIC DIAGRAM 10 6 ...
Page 178: ...MODEL LCD1920NX LCD MAIN BD 7 7 SCHEMATIC DIAGRAM 10 7 ...