Samsung UN40HU6950F, Service Manual, Page: 23 / 81

4-1-1. Previous Check
Check the various cable connections first. 1.
Check to see if there is a burnt or damaged cable. -
Check to see if there is a disconnected or loose cable connection. -
Check to see if the cables are connected according to the connection diagram. -
Check the power input to the Main Board. 2.
Speaker
Power Board
Power Cable
LVDS Cable
T-con Board
Main Board
How to distinguish if the problem is caused by 3. Main Board or T CON
No Video
-
If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster than nomal booting,
replace the T-CON board.
Distorted Picture
-
Check the inner patterns.
For All mode •
NT14U NT72323BG FRC Picture Problem
OK OK NG Main Board or Signal Source
NG OK NG Main Board
NG NG NG Main Board or LVDS cable or T CON or Panel
Only for HDMI mode (additional check) •
HDMI Picture Problem
OK NG There is no problems after HDMI IC check HDMI source or HDMI jack.
NG NG There is no problems before HDMI IC check X12 pattern or LVDS cable or T CON
4. Troubleshooting
4-1. Troubleshooting
4-1
4. Troubleshooting