Samsung LE40M91B Service Manual page 32

4-2-5 No Picture (Video_CVBS)
Power Indicator is off.
Lamp on, no picture.
Yes
Dose the signal appear at
4
#10 of IC4001?
Yes
Does the signal appear at
Out of IC4001, RA6053~5?
Yes
Does the digital data appear
at the output of IC4003
(RA6019_FRC~6021_FRC)?
Yes
Does the digital data appear
at the input of IC6003, 6004
(RA6001_FRC~RA6003_FRC,
RA6005_FRC, RA6009_FRC,
RA6016_FRC, RA6018_FRC)?
Yes
Does the digital data appear
at the out of L6001~12?
Yes
Check a LVDS cable?
Replace a lcd panel?
No
Check a A/V cable and video signal.
No
Check a connection harness.
No
Check a IC515.
Change a main PCB ass'y
No
Check IC4003
Change a main PCB ass'y.
No
Check IC6005
Change a main PCB ass'y.
No
Check IC6003,4
Change a main PCB ass'y.
No
Please, Call to Samsung Co. LTD.
4 Troubleshooting
4-9