Samsung MJ15AS* 510N Service Manual page 19

5 Troubleshooting
5-2-1 No Video (ANALOG)
Check signal cable connection and
power.
1
X400 oscillate properly?
Yes
Is there R, G, B input at
R100, R101 and R103?
Yes
Is there Hsync, Vsync waveform
2 3
at Pin 100, 1 of IC 400?
Yes
Is there Hsync, Vsync waveform
3
2
at Pin 43, 44 of IC 200?
Yes
Does the output signal appear
at Pin 17~20, 22~27 of CN400?
Yes
There are DC 5V at Pin 1, 2
and 3 of CN400?
Yes
Replace LCD Panel.
MJ15AS*/MJ15BS*/MJ17AS*/MJ17BS*/
MJ19AS*/MJ19BS*/MJ19ES*
No
Replace or check related circuit.
No
Check input part.
No
Check IC400 and related circuit.
No
Check IC200 and related circuit.
No
Check IC400 and related circuit.
No
Check the panel EN signal at R222
and BL_EL signal at R603.
5-3