4-1-4. 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
Does the signal appear at
CN1201 (Pin#12 , #7 )(HDMI1)
CN1202 (Pin#12 , #7 )(HDMI2)
CN1203 (Pin#12 , #7 )(HDMI3)
CN1204_C5 (Pin#12 , #7 )(HDMI4)
(HDMI RX_Clk , RX_Data) ?
Does the digital data appear at
TP - O_TXCLK+, O_TXCLK-,
E_TXCLK+, E_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the HDMI signal properly.
Please, Contact Tech support.
Check CN1001, CN1002.
CN1003, CN1004.
Check HDMI cable.
Change the Main Assy.
Check IC301 (SX1).
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the HDMI source and
check the connection of HDMI cable ?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
3
2
Caution Make sure to disconnect the power before working on the IP board.
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