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Model no UA46D5500RR
DC 300 is coming backlight 80 volt variation is coming motherboard supply not come out after removed the connector condition ,5,3.3,5 these volts are not visible this is is the problem of powerboard or motherboard please answer
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Hi @murugappan mpm,
If it is not a Samsung LCD TV please confirm the make and model number of the TV?
If it is a Samsung LCD TV, try the following:
Turn off the TV.
Disconnect the power from the TV
Remove the back cover from TV
Disconnect the cable between the mainboard and the power board.
Reconnect power to TV and switch on the TV.
The TV screen LED backlights should turn full on and stay on. There will be no picture because the mainboard is disconnected.
If there are no backlights and you are measuring 300V DC at the LED power cable connector on the power board, with the LED power cable connected, then there is a problem with the LED backlight circuit somewhere between the power board connector and or in the LED array.
With the TV boards all connected properly, can you turn on the TV and do you get audio and can you see images on the screen if you shine a torch at an angle close to the screen? They will be very faint if they are there if the backlights aren’t working
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Model no UA46D5500RR Samsung tv complaint is no standby light ,TV not getting onI checked DC bridge rectifier voltage is above 300 ,, back light voltage is 80volt variation motherboard connected votage is absent this is problem of power board or motherboard I checked capacitors and components are ok in cold check please give your suggestion
@murugappan mpm ,
Did you check the voltages for connector CN803A as marked on the board? This is if the power board is a BN44-00422Aof course
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