Samsung LE27S73BD Service Manual page 39

4-2-4 No Picture (Tuner_CVBS)
Power Indicator is off.
Lamp on, no picure.
Yes
Dose the signal appear
4
at R5014?
Yes
Does the signal appear at
4
#8 of IC4001?
Yes
Does the digital data appear at
3
output of R4104~R4113?
Yes
Check a LVDS cable?
Replacea lcd panel?
No
Connect the RF cable and
check RF signal.
No
Check a B+ voltage (#3 of Tuner) 5V,
change a main PCB ass'y
No
Change a main PCB ass'y.
No
Check a IC4001.
Change a main PCB ass'y.
No
Please, Call to Samsung Co. LTD.
4 Troubleshooting
4-7