Samsung UN19C4000PD Service Manual page 32

4. Troubleshooting
4-1-3. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
- Check the PC source
Major
Check the Arsenal, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
1
2
Diagnostics
Make sure to disconnect the power before working on the IP board.
Caution
4-4
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the PC source and
check the connection of D-SUB ?
Yes
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS, PC_VS
(R, G, B, H, V) ?
Yes
Does the digital data appear at
TP - O_TXCLK+, O_TXCLK- ?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
Check a set in the 'Stand-by mode'
No
or 'DPMS mode'.
No
Input the analog PC signal properly.
Check CN901, PC cable.
Change the Main Assy.
No
26" : BN94-03399B
22"/19" : BN94-03399C
Check IC301 (SX1)
Change the Main Assy.
No
26" : BN94-03399B
22"/19" : BN94-03399C
Please, Contact Tech support.
No