Samsung LA32C550J1R Service Manual page 25

4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
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Check the HDMI source.
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Major
Check the IC1102(SX1) , Check the HDMI switch
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
1
Diagnostics
2
Caution Make sure to disconnect the power before working on the IP board.
2
1
Power Indicator is off.
Lamp on, no video.
Yes
Check the connection of HDMI cable?
Yes
Does the signal appear at
CN1202(Pin#12, #7 )(HDMI1),
CN1203_H2(Pin#12, #7)(HDMI2),
CN1204_SH(Pin#12, #7 )(HDMI3),
(HDMI RX_Clk , RX_Data)?
550 MODEL
CN1201_550(HDMI3)
CN1204_SH(HDMI4)
Yes
Does the digital data appear at output of
output of LVDS Cable?
Yes
Check the LVDS cable?
Replace the LCD panel?
Yes
Please, Contact Tech support
1
No
No
No
4. Troubleshooting
Input a HDMI cable.
Check HDMI cable.
Check a IC1201 HDMI SWITCH IC.
Change a main PCB ass'y.
Check a IC1201 HDMI SWITCH IC.
Change a main PCB ass'y.
4-5