Samsung LN26D450G1G Service Manual page 26

4. Troubleshooting
4-1-3. No Video_Analog PC signal
Symptom Audio is normal but no picture is displayed on the screen.
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Check the PC source.
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Major
Check the Arsenal, Check the Chelsea.
-
checkpoints
This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected.
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(Support  Self Diagnosis  Picture Test)
Diagnostics
Dose the promblem still exist self diagnosis?
1
2
Caution Make sure to disconnect the power before working on the IP board.
4-4
Power indicator LED is off.
Lamp (Backlight) on, no video?
Yes
Check the Self Diagnosis
Yes
Check the PC source and
check the connection of D-SUB?
Yes
Does the signal appear at
R804 (R), R805 (G), R806 (B)
BD404 (H), BD405 (V)?
Yes
Does the digital data appear at
TP-EVEN_TXCLK+, EVEN_TXCLK-,
ODD_TXCLK+, ODD_TXCLK-?
Yes
Check the LVDS Cable?
Check the T-Con Board?
Replace the LCD Panel?
No
Check a set in the 'Stand-by mode' or
'DPMS mode'.
No
Input the analog PC signal properly.
No Check CN401, PC cable.
Change the Main Assy.
No Check IC1001 (X5).
Change the Main Assy.
No
Please, Contact Tech support.