No Video (Hdmi 1, 2, 3, 4 - Digital Signal) - Samsung LN32B550K1R Service Manual

4. Troubleshooting

4-1-3. No Video (HDMI 1, 2, 3, 4 - Digital Signal)

Symptom Audio is normal but no picture is displayed on the screen.
-
Check the HDMI source.
-
Major
Check the HDMI switch, Check the SEMS03.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
3
3
2
Caution Make sure to disconnect the power before working on the IP board.
4-8
Power Indicator is off.
Lamp(Backlight) Off, no video?
Yes
Check the HDMI source and check
the connection of HDMI cable?
Yes
Does the signal appear at
R9030 (Pin#10 , #6 )(HDMI1)
R9018 (Pin#10 , #6 )(HDMI2)
R6105 (Pin#10 , #6 )(HDMI3)
R6014 (Pin#10 , #6 )(HDMI4)
(HDMI RX_Clk , RX_Data)?
Yes
Does the digital data appear at
R6021, R6025
(D2 RX_Clk, D2 RX_Data)?
Yes
Does the digital data appear at
TP8007(FBE_HSYNC_IN)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the HDMI signal properly
Check JA3001~4
No
Check HDMI cable
Change the Main Assy
BN94-02709A
Check IC9001 (HDMI switch)
No
Change the Main Assy
BN94-02709A
Check IC8003 (FBE)
No
Change the Main Assy
BN94-02709A
No
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