No Video (Tuner Dtv) - Samsung LE32B53 SERIES Service Manual

4-1-6. No Video (Tuner DTV)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the DTV source.
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Major
Check the Tuner, Check the Chelsea.
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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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 B5V_VCCT_PW,
B1.25VT_PW, B3.3V_PW
appear at #3, #15, #12 Pin of Tuner?
Yes
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Check the T-Con B'd?
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
Check IC4010 (Saturn4)
No
Change the Main Assy
No
Please, Contact Tech support
4. Troubleshooting
Check a set
4-13