Samsung UE49K5502AK - No Picture (COMPONENT)

No picture (COMPONENT) 
Diagnostics
If the LED of POWER is off,
check Back Light is turn on.
No
Check what is status ‘Stand-by’ or not.
Yes
Check a video source & cable
No
Check Video signal.
Yes
Check the SelfTest.
(Support > Self Diagnosis > Picture Test)
Remain other Problem?
No
Check for connecting external device.
Yes
Check
R534(COMP1_Y/CVBS)
R501(COMP1_PR)
R502(COMP1_PB).
No
Check the CN501.
Change the Main Assy.
Yes
Check the assembling state of LVDS /
Change the Panel.
4-8
4. Troubleshooting