4-2-2. No video_HDMI1, 2 - Digital signal
Symptom
Audio is normal but no picture is displayed on the screen.
Major
checkpoints
Check the HDMI source.•
Check the HDMI switch, Check the Chelsea.•
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.•
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video.
No
Check a set in the ‘Stand-by mode’
Yes
Check the Self Diagnosis (Support →
Self Diagnosis- → Picture Test).
Dose the promblem still exist self
diagnosis?
No
Check external devices and
connections.
Yes
Check the HDMI source and check the
connection of HDMI cable.
No
Input the HDMI signal properly.
Yes
1
Does the signal appear at CN501_H1
(Pin#12 , #7 )(HDMI1), CN502_H2
(Pin#12 , #7 )(HDMI2) (HDMI RX_Clk ,
RX_Data).
No
Check CN501_H1,CN502_H2.
Check HDMI cable.
Change the Main Assy.
Yes
2
Does the digital data appear at TP-E_
TXCLK+, E_TXCLK- , O_TXCLK+,
O_TXCLK-.
No
Check IC901 (NT13).
Change the Main Assy
Yes
Check the LVDS cable?
Check the T-Con Board?
Replace the LCD panel?
Yes
Please, Contact tech support.
Caution Make sure to disconnect the power before working on the Main board.
4-4
4. Troubleshooting
4-5
4. Troubleshooting
4-4
4. Troubleshooting
4-5
4. Troubleshooting
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