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Troubleshooting – No PC(D -SUB) Video
Troubleshooting – No PC(D -SUB) Video
Does the LED light up when turn on the power?
YES
Does 5V appear at Pin 9 of CN101 D-Sub?
YES
Does the waveform as the figure at Pin 6 ( H-sync)
6
and Pin 8 (V-sync)
of IC103 appear?
YES
Is TX** signal sent to Pin 14 and 15 of CN403 14, 15?
YES
Check the cable between the main board and panel and
replace the LCD panel.
NO
Check the power port.
NO
Check the cable connection.
NO
5
Replace IC103.
NO
The Scaler(IC408) is abnormal.
Replace the main board.
CN403
C603
IC103
CN101
5
6
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