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4-1-5. No Video (Tuner DTV)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the DTV source
-
Major
Check the MSD237HCG.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
2
Caution
Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the connection of RF cable?
Yes
Check the 'signal strength'
in Self Diagnosis menu
Strength is enough?
Yes
Does the DC TU5V_PW, TU33V_PW
appear at #3, #5 Pin of Tuner?
Yes
Does the digital data appear at
CN109 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the RF cable properly.
No
Check the D-TV source.
No
Change the Main Assy
BN94-02990A
Check IC4010 (Saturn4)
No
Change the Main Assy
BN94-02990A
No
Please, Contact Tech support
4. Troubleshooting
Check a set
4-13
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