Samsung LN32B550K1R, Service Manual

Page: 30 / 93

4-8
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.
-
Major
checkpoints
Check the HDMI source.
Check the HDMI switch, Check the SEMS03.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check JA3001~4
Check HDMI cable
Change the Main Assy
BN94-02709A
No
Yes
Does the digital data appear at
R6021, R6025
(D2 RX_Clk, D2 RX_Data)?
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video?
Yes
Check the HDMI source and check
the connection of HDMI cable?
No
Input the HDMI signal properly
Yes
Check IC9001 (HDMI switch)
Change the Main Assy
BN94-02709A
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
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)?
Does the digital data appear at
TP8007(FBE_HSYNC_IN)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
No
Check IC8003 (FBE)
Change the Main Assy
BN94-02709A
3
3
2
No
Check a set
in the ‘Stand-by mode’.
Caution Make sure to disconnect the power before working on the IP board.