Samsung HG43NT678UF Service Manual page 54

4-2-2. TV POWER STANDBY Test
„ Simplified Version
Verify Standby Light
1
Power TV On ?
2
If Standby light won't
3
change (turn off or flash)
If Standby LED Flashes
and TV won't power on ?
4
Verify Backlight Turns On ?
5
If missing perform Standby Test / Function Test
9
Check Standby LED changes and TV Powers On
9
Check with both Remote & Function Control Power command
9
PIN (Power On/Off
9 8
changes from 0Vdc (off) to
3.3Vdc (on)
GND
1 2
A13V
3 4
A13V
5 6
A13V
8
7
A13V
9 10
GND
11 12
Disconnect Panel Cables from Main Board
Power TV On ?
If No Backlight ?
4. Troubleshooting
Replace Main Board
9
CNM801
ANA-DIM
OD ON/OFF
BLU_PWM
Power_On/Off
GND
GND
Check TV Powers On
9
(Audio – No video)
If TV now Powers On
9
Perform Backlight Test
9
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