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4. Troubleshooting
4-3. No Video (Analog)
Symptom
Though the LED power turns on, the screen is blank when connecting the VGA cable.
-
Check the D-sub cable connections.
-
Major
Check whether the LVDS cable is connected correctly to the panel.
-
checkpoints
Check whether the lamp connector of the panel is connected correctly to the IP board.
-
Diagnostics
2
4
Caution
Make sure to disconnect the power before working on the IP board.
4-4
4
1
3
2
Power Indicator is green
Yes
Does a signal appear at
C104, C106 and C107
1
(R, G, G input?)
Yes
Does a signal appear at
R107 and R110 (H/V Sync)?
Yes
Does a signal appear at
1~30 of CN201 (LVDS out)?
Yes
Replace LCD PANEL
5
Main Board
No
No
3
No
Check Circuits related CN103
Check circuits relate CN 103
Check circuits related IC 204
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