After spending unknown hours searching the web, I keep ending up here so I'm hoping someone can help me with my problem.
I did find this thread https://www.badcaps.net/forum/showthread.php?t=69298 but the OP didn't report back on his results.
As the title says, I have a Samsung UN60H6203AFXZA and as soon as I plug it in, the LED backlights begin to steadily flash. The TV does not power up that I can tell. I get no boot-up sequence or sound.
Power supply board is BN44-00775A. I don't see any bad caps or signs of excessive heat anywhere on the boards.
If I unplug the main board from the power supply board, but leave the LEDs connected, I still get the steady blinking of the LED backlights.
If I reconnect the main board and unplug the LED backlights from the power supply board the stand-by LED will blink a few times (I counted 6) but it doesn't seem to respond when I press it. I've tried shining a light through one of the holes but I can't see anything showing up on the screen.
With power connected to the power supply, the main board and LEDs disconnected, and the negative probe of my multi-meter connected to the board grounding screw, the voltage readings are as follows.
Power board output
CNM803
1 A13v = 12.93v
3 A13v = 12.93v
5 A13v = 12.93v
7 A13v = 12.93v
9 GND = 0
2 UD = 2.35v
4 PWM_BLU = 3.35v
6 PS_ON = 4.55v
8 GND = 0
10 GND = 0
LED connection - LED strips NOT connected
CNL802
D+ = 465v
D+ = 465v
Nc = .002v
S- = .002v
Nc = .001v
S+ = .001v
Nc = .001v
D- = -.002v ??
D- = -.002v ??
LED connection - LED strips connected and flashing, which made it difficult to get accurate measurements.
CNL802
D+ = 103-112v
D+ = 103-149v and rising
Nc = -.006-.013v
S- = ~35v
Nc = -.003-.013v
S+ = -.06-.08v
D- = -.166- -.3v
D- = -.3v
I also tested the LED strips with an LED tester and got these results.
Checking the LED plug connections A in the attached photo = 77v
Checking the LED plug connections B in the attached photo = 48.3v
I did read in this thread that LED voltage could possibly be 113v, but I'm not sure if that applies to the exact model.
https://www.badcaps.net/forum/showth...ht=bn44-00775A
So, from all that information, my hunch is bad LEDs. But the fact that the TV doesn't seem to power up with the LEDs disconnected is throwing me off.
Thoughts?
More info needed?
Next steps?
Thank you in advance!
I've attached several pictures of the boards and connections.
I did find this thread https://www.badcaps.net/forum/showthread.php?t=69298 but the OP didn't report back on his results.
As the title says, I have a Samsung UN60H6203AFXZA and as soon as I plug it in, the LED backlights begin to steadily flash. The TV does not power up that I can tell. I get no boot-up sequence or sound.
Power supply board is BN44-00775A. I don't see any bad caps or signs of excessive heat anywhere on the boards.
If I unplug the main board from the power supply board, but leave the LEDs connected, I still get the steady blinking of the LED backlights.
If I reconnect the main board and unplug the LED backlights from the power supply board the stand-by LED will blink a few times (I counted 6) but it doesn't seem to respond when I press it. I've tried shining a light through one of the holes but I can't see anything showing up on the screen.
With power connected to the power supply, the main board and LEDs disconnected, and the negative probe of my multi-meter connected to the board grounding screw, the voltage readings are as follows.
Power board output
CNM803
1 A13v = 12.93v
3 A13v = 12.93v
5 A13v = 12.93v
7 A13v = 12.93v
9 GND = 0
2 UD = 2.35v
4 PWM_BLU = 3.35v
6 PS_ON = 4.55v
8 GND = 0
10 GND = 0
LED connection - LED strips NOT connected
CNL802
D+ = 465v
D+ = 465v
Nc = .002v
S- = .002v
Nc = .001v
S+ = .001v
Nc = .001v
D- = -.002v ??
D- = -.002v ??
LED connection - LED strips connected and flashing, which made it difficult to get accurate measurements.
CNL802
D+ = 103-112v
D+ = 103-149v and rising
Nc = -.006-.013v
S- = ~35v
Nc = -.003-.013v
S+ = -.06-.08v
D- = -.166- -.3v
D- = -.3v
I also tested the LED strips with an LED tester and got these results.
Checking the LED plug connections A in the attached photo = 77v
Checking the LED plug connections B in the attached photo = 48.3v
I did read in this thread that LED voltage could possibly be 113v, but I'm not sure if that applies to the exact model.
https://www.badcaps.net/forum/showth...ht=bn44-00775A
So, from all that information, my hunch is bad LEDs. But the fact that the TV doesn't seem to power up with the LEDs disconnected is throwing me off.
Thoughts?
More info needed?
Next steps?
Thank you in advance!
I've attached several pictures of the boards and connections.
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