
7
Troubleshooting – No DVI Video
Troubleshooting – No DVI Video
Does the LED light up when turn on the power?
Does 5 V appear at Pin 14 and 16 of CN101 DVI port?
Check the power port.
NO
YES
Check the cable connection.
NO
Does the wave form as the figure appear at R161(DVI_SCL)
and R162(DVI_SDA) ?
YES
Replace the main board.
NO
Does the signal appear at RA107(R), RA102(G), and RA105(B)?
YES
IC105 is abnormal. Replace the main board.
NO
YES
The Scaler (IC408) is abnormal.
Replace the main board.
NO
Check the cable between the main board and panel
and replace the LCD panel.
YES
Does the TX** signal appear at Pin 14 and 15 of CN403?
7
8
8
CN403
CN101
R161
R162
RA102 ,
105,107
Summary of Contents for 400UXn - SyncMaster - 40" LCD Flat Panel Display
Page 7: ...Introduction Rear Introduction Rear Rear 1 POWER S W 2 POWER IN Connection Terminal ON OFF ...
Page 15: ...Accessories Sold Separately Unpacking Unpacking Speaker wire ...
Page 27: ...Installing Stand Kit Installing Stand Kit Installing the Semi Stand ...
Page 47: ...Block Diagram Block Diagram Main Circuit Main Circuit Main ...
Page 48: ...Block Diagram Block Diagram Network Circuit Network Circuit Main ...
Page 50: ...Block Diagram Block Diagram Network Power Network Power Network Power Tree ...
Page 56: ...Schematics Power Schematics Power IC601 3 3V 1 8V IC604 3 3V 2 5V IC602 12V 3 3V ...
Page 57: ...Schematics Power Schematics Power IC610 5V 3 3V ...
Page 67: ...Schematics Sound AMP Schematics Sound AMP Sound Processor IC502 Speaker output CN506 ...
Page 68: ...Schematics EPROM Schematics EPROM Function CN402 RS232 IC109 EEPROM IC403 ...
Page 102: ...MDC Multi Display Control Program MDC Multi Display Control Program How to install ...
Page 120: ...MDC Multi Display Control Program MDC Multi Display Control Program ...
Page 130: ...40 SMPS Board Block Diagram 40 SMPS Board Block Diagram ...
Page 131: ...46 SMPS Board Block Diagram 46 SMPS Board Block Diagram ...
Page 132: ...Network Power Board Block Diagram Network Power Board Block Diagram ...