Samsung LN32A650A1F - No Video (Component 1, 2)

4-15
4. Troubleshooting
4-1-8. No Video (Component 1, 2)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the Component source
Check the MST336CCLK, Check the Bayhill+
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check CN201
Change the main PCB ass’y
Power Indicator is off.
Lamp(Backlight) Off, no video
No
Check component source and
check the connection of
component cable ?
Does the signal appear at R248, R249,
R250 (Comp1) R208, R209, R210
(Comp2) (Y, Pb, Pr)?
Yes
Yes
Input a component signal.
Check the connected cable.
Yes
9
No
Check IC601
Change the main PCB assembly
Does the digital data appear at
RA605, RA606, RA646, RA647(Rout)
RA603, RA604, RA633, RA634(Gout)
RA601, RA602, RA631, RA632(Bout)?
Yes
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the digital data appear at output
of R1308 ~R1321, R1323~R1336?
No
Check IC1001
Change the main PCB assembly
5
Caution Make sure to disconnect the power before working on the IP board.