Samsung UN46C6300SFXA keeps clicking

[tibimakai]

Re: Samsung UN46C6300SFXA keeps clicking

OK, I have removed both pins and it didn't turn on.
I have used a 2.2Kohm resistor and it turned on with a flickering backlight.
The 3.3V measured by itself(unplugged) it shows the fluctuating 0V and 3.3V.
So it seems that the problem is from the mainboard.

[budm]

Re: Samsung UN46C6300SFXA keeps clicking

You can disconnect just the PS_ON pin and the BL_ON pins to see if the Voltage will go up, we just trying to find out if it has built-in pull up resistors for these two signal pins on the power supply board, if not, then you can force on using the resistors between 5v and th those two pins as usual to force it on.

[tibimakai]

Re: Samsung UN46C6300SFXA keeps clicking

I have took some measurements on the PS connector and this is what I have got:
PS= 0V
SB= 5.3v this is the only one stable voltage
D5.3V= 5.3V
GND= 0V
GND= 0V
H-Sy=4.5V
PWM= 3.99V
BL= 0V
DET= 3.3V
Vamp= 17.08V
Vamp= 17.08V
D5.3V= 5.3V
D5.3V= 5.3V
GND= 0V
GND= 0V
D12V= 12.76V
D12V= 12.76V
D12V= 12.76V
So it seems that the STBY is working, but everything else is turning on or off.
I have read at justanswer a similar case, but with a different model number and after they have replaced the mainboard, it didn't fix the problem.
After replacing the power supply, the TV worked as it should.

[tom66]

Re: Samsung UN46C6300SFXA keeps clicking

May not apply for new Samsung LED, using multi-region dimming, it might need commands to set up the dim level on each LED.

[tibimakai]

Re: Samsung UN46C6300SFXA keeps clicking

Thanks for the fast reply.
I have tried disconnecting mainboard from power supply, which didn't do anything. TV did not turned on at all, not even the LED.
With the T-con disconnected, the TV just did the same thing, keeps clicking with red LED always on.
I understood that with the newer TVs, if you disconnect the wire harness between the main and PS, the TV should turn on the backlight.

[tom66]

Re: Samsung UN46C6300SFXA keeps clicking

Main board fault is very likely. Replacement only usually.

However, do isolate the T-con first and see if set powers up with backlight. If so, you have a shorted T-con or panel.

[tibimakai]

I have picked up this TV and I don't know where to start.
The person who sold it to me, replaced some capacitors, purchased from Mouser. The replacement did not change the problem.
It seemed like he knew what kind of capacitors to purchase. He even gave me the extra capacitors that he purchased.
All the voltages are turning on and off.
I can measure these voltages 384V, 12.27V, 5.2V, but only for a couple of seconds and then they turn off and then right back on.
The red LED is on all this time without any blinking.
Backlight doesn't turn on at all.
Where should I start?