Samsung UN55D6900WF - Simple Flow Chart of Malfunction

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4. Troubleshooting
Simple ow chart of malfunction 
Yes
No
No
Does the TV turn on?
Can you see anything
on the screen?
Yes
Can you see
OSD menu running on
the screen?
Check LVDS cable connected
to Main Board.
If necessary, replace the
Main Board
Yes
Can you see Digital
Channel broadcast ?
No
Replace the Main Board
Check the Power Cord.
Yes
No
No
Is standby LED on?
Yes
A5V appear at
4 of CN201?
Yes
Is any sound of TV?
No
Check dimming cable.
If necesary replace the
Main Board.
No
Check 28p cable.
If necessary, replace the
SMPS board.
Yes
B13V appear at the
pin 11, 12, 13 of
CN201?
No
Change the Main Board.
Please, contact Tech
support.