Troubleshooting; Previous Check - Samsung UN40KU7000F Service Manual

4. Troubleshooting

4-1. Previous Check

Check list for initial operation
„
1. Check the various cable connections first.
Check to see if there is a burnt or damaged cable.
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Check to see if there is a disconnected or loose cable connection.
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Check to see if the cables are connected according to the connection diagram.
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2. Check the power input to the Main Board.
3. How to distinguish if the problem is caused by Main Board.
No Video
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Symptom
Check Points
Distorted Picture :
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Check Points
Inner View
„
ASSY PCB MAIN
If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster
than nomal booting.
• Replace the Main Board.
• Check the inner patterns.
ASSY BOARD P-FUNCTION / NETWORK
ASSY SPEAKER P-FRONT
4. Troubleshooting
DC VSS-PD
BOARD
4-1