Samsung LED TV troubleshooting. Help is very appreciated!

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

'Pin 12 (BLU) = 0' So the main board is not sending the
Backlights ON signal. We can force on manually.

Thank you for your time!
Okay how? By shorting some pins? Can this cause the power cycling?

Does the other pins look correct?

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

As far as i can tell BLU is connected to 13V through a resistor on the main board.

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

As far as i can tell BLU is connected to 13V through a resistor on the main board.

Forget this! My bad...

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

'Pin 12 (BLU) = 0' So the main board is not sending the Backlights ON signal. We can force on manually.

I have tried to connect pin 12 (BLU) to 5 volts. This does turn on the backlight, but the television is still power cycling (meaning that the screen turns on and off and i can hear a relay clicking, in intervals of 2 seconds).

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

It appears to be the PS pin that causes the power cycling. If i remove the PS pin from the connector the TV doesn't power cycle. But i Can still only turn the backlight on and OFF. Other functions isn't working. Any ideas?

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

The PS pin is btw also called SW_PWR_OUT. So the main board is changing the State of this pin every 2 second.

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

Is it at all possible to fix the main board?

[ReeceyBurger123]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

Not understanding you too well, is the Pson going high then low ?

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

Not understanding you too well, is the Pson going high then low ?

Yes it is switching with 2 second intervals. And the "backlight on" is staying low.

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

I still haven't solved the problem. Does anyone know a solution?

[comptek]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

remove t-con cable "carefully" try that and all other boards and cables connected

[anmol]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

desolder blue and yellow wire and solder as this pic.

may be you have pin # 17 and pin # 18 have short circuit.

Regards.

[Akoen]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

Thank you, but i have measured and the pins are not shorted.

[br777]

Re: Samsung LED TV troubleshooting. Help is very appreciated!

Hi, I know this is an old thread...did you find a solution?