Samsung LN26C450E1H Service Manual page 39

4. Troubleshooting
4-1-8. No Video (Component)
Symptom Audio is normal but no picture is displayed on the screen.
Check the Component source
Major
Check the chelsea.
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Check the component source and check the
connection of component cables (Y,Pb,Pr) ?
Diagnostics
TP - COMP1_Y, COMP1_PB, COMP1_PR
4
TP - COMP2_Y, COMP2_PB, COMP2_PR
2
Caution Make sure to disconnect the power before working on the IP board.
4-20
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Yes
Does the component data appear at
(Comp / Y, Pb, Pr) ?
Yes
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK-,
O_TXCLK+, O_TXCLK- ?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the video source properly.
Check CN701.
Change the Main Assy.
No
C450: BN94-03377Z
C459: BN94-03377M
C539: BN94-03379B
Check IC301 (SX1)
Change the Main Assy.
No
C450: BN94-03377Z
C459: BN94-03377M
C539: BN94-03379B
No Please, Contact Tech support.