Samsung UA42EH5000R Service Manual page 47

No video (Tuner_CVBS)
„
Symptom
Audio is normal but no picture is displayed on the screen.
• Check the Tuner CVBS source
Major • Check the X9N
checkpoints
• This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Diagnostics
Check the CVBS data at #10 Pin of Tuner?
Make sure to disconnect the power before working on the IP Board.
Caution
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the RF source and check the
connection of RF cable ?
Yes
Check the Self Diagnosis (Support ⇢
Self Diagnosis ⇢ Picture Test) Dose the
promblem still exist self diagnosis?
Yes
Does the DC B3.3V, B1.8V appear at
#4(BD607), #2(BD604) Pin of Tuner ?
Yes
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No Check a set in the 'Stand-by mode'.
No Input the RF source properly.
Check external devices and
No
connections.
No Change the Main Ass'y.
No Change the Main Ass'y.
No Please, Contact Tech support.
4. Troubleshooting
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