Samsung UE**F5000A SERIES - How to Know It Is from Main Board or T-Con When some Problems Happen

How to know it is from Main Board or T-Con when some problems happen 
No Picture : Backlight is on, but there is no picture and LED indicator in front of TV is blinking.1.
Check the LVDS Cable connection. If still problems, change the T-Con Board and then Main Board step by step. -
Picture distortion : Enter the service mode 2. ⇢ Choose ‘SVC’ ⇢ Check the ‘internal pattern.’
Enter ‘Service Mode.’ -
If you do not have Factory remote control•
Power OFF Info MENU Mute Power On
If you have Factory remote control•
INFO Factory
Choose ‘SVC.’3.
Choose ‘Test pattern.’4.
Select the each pattern and then check all pattern is ok or not.5.
Option
Control
Debug
SVC
ADC/WB
Advanced
Test Pattern Mstar Test Pattern
Pattern Status is Change the Test Pattern is made by the MSTAR IC
OK Main Board We guess front of MSTAR IC has problem.
NG Panel and T-Con Board We guess back of MSATR IC has problem.
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4. Troubleshooting