Samsung 913V - SyncMaster - 19" LCD Monitor, Service Manual

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5 Troubleshooting
5-3
X400 oscillate properly?
1
WAVEFORMS
2
3
5-3 No Video
1
Replace or check related
circuit.
Check signal cable connection and
power.
Yes
No
Is there R, G, B input at
R100, R101 and R103?
Check input part.
Yes
No
Is there Hsync, Vsync waveform
at Pin 100, 1 of IC 400?
Check IC400 and related
circuit.
No
Yes
Is there Hsync, Vsync waveform
at Pin 43, 44 of IC 200?
Check IC200 and related
circuit.
No
Yes
Does the output signal appear
at Pin 17~20, 22~27 of CN400?
Check IC400 and related
circuit.
No
Yes
There are DC 5V at Pin 1, 2
and 3 of CN400?
Check the panel EN signal at R222
and BL_EL signal at R603.
No
Yes
Replace LCD Panel.
2
3
2 3