Hi guys,
I currently have a Samsung UE46D6200TSXZG which does not turn on. When connecting the power cord the standby LED comes on normally. When pressing the power button the standby LED starts flashing 2x 5 times. After these flashes you can hear the mainboard switching on for a second. When I connected the TV the first time it did flash the backlight for a very short time but since then I didn't see it again.
Modelnumbers:
PSU: BN44-00458A (PSLF151A03D)
Mainboard: BN41_01604C (BN94-05367J)
TCON: V460HK1-C01
The inside of the TV is generally covered in black dust but there are until now no obviously burned components. When disconnecting the mainboard the backlight turns on and stays on. The TV won't try to power up without the TCON at all. If I disconnect the TCON while the TV is powering up it doesn't change anything.
I did some measurements on connector CNM803A.
Everything connected, TV in standby:
Everything connected, TV trying to power up:
Just backlight connected:
Since the voltages are alright and the backlight turns on with nothing connected I think the PSU is alright. I'm pretty sure the fault is in the mainboard. It's my third TV with a similar mainboard and a new mainboard always fixed it.
This time instead of just swapping out the mainboard and expecting the owner to come back in six months just because the same fault appeared again, I'm more interested in trying to find the fault on this mainboard.
Any suggestions on this? Are the caps in the pictures already considered to be bulged or do they look normal? I did try to reset the EEPROM with shorting M_E_SDA and M_NRESET without luck.
The owner told me that the TV did throw the circuit breaker the last time it worked and after he came back the TV showed this behaviour. He's not sure the TV caused this and since the fuses on the PSU are ok I don't worry about that.
I probably forgot something so just ask. I'm open for any suggestions.
I currently have a Samsung UE46D6200TSXZG which does not turn on. When connecting the power cord the standby LED comes on normally. When pressing the power button the standby LED starts flashing 2x 5 times. After these flashes you can hear the mainboard switching on for a second. When I connected the TV the first time it did flash the backlight for a very short time but since then I didn't see it again.
Modelnumbers:
PSU: BN44-00458A (PSLF151A03D)
Mainboard: BN41_01604C (BN94-05367J)
TCON: V460HK1-C01
The inside of the TV is generally covered in black dust but there are until now no obviously burned components. When disconnecting the mainboard the backlight turns on and stays on. The TV won't try to power up without the TCON at all. If I disconnect the TCON while the TV is powering up it doesn't change anything.
I did some measurements on connector CNM803A.
Everything connected, TV in standby:
1. GND : -
3. B13V: 0.0 V
5. B13V: 0.0 V
7. Vamp: 0.0 V
9. Vamp: 0.0 V
11. GND: -
13. B5V: 0.0 V
15. B5V: 0.0 V
2. OD_ON: 0.0 V
4. PWM_DIM: 0.0 V
6. N.C.: -
8. BLU_on/off: 0.0 V
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 0.26 V
3. B13V: 0.0 V
5. B13V: 0.0 V
7. Vamp: 0.0 V
9. Vamp: 0.0 V
11. GND: -
13. B5V: 0.0 V
15. B5V: 0.0 V
2. OD_ON: 0.0 V
4. PWM_DIM: 0.0 V
6. N.C.: -
8. BLU_on/off: 0.0 V
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 0.26 V
1. GND : -
3. B13V: 0.0 V / 12.66 V (cycling)
5. B13V: 0.0 V / 12.66 V (cycling)
7. Vamp: 0.0 V / 12.66 V (cycling)
9. Vamp: 0.0 V / 12.66 V (cycling)
11. GND: -
13. B5V: 0.0 V / 5.27 V (cycling)
15. B5V: 0.0 V / 5.27 V (cycling)
2. OD_ON: 0.0 V / 0.54 V (cycling)
4. PWM_DIM: 0.0 V / 1.13 V (cycling)
6. N.C.: -
8. BLU_on/off: 0.0 V / 0.13 V (cycling)
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 0.26 V / 3.28 V (cycling)
3. B13V: 0.0 V / 12.66 V (cycling)
5. B13V: 0.0 V / 12.66 V (cycling)
7. Vamp: 0.0 V / 12.66 V (cycling)
9. Vamp: 0.0 V / 12.66 V (cycling)
11. GND: -
13. B5V: 0.0 V / 5.27 V (cycling)
15. B5V: 0.0 V / 5.27 V (cycling)
2. OD_ON: 0.0 V / 0.54 V (cycling)
4. PWM_DIM: 0.0 V / 1.13 V (cycling)
6. N.C.: -
8. BLU_on/off: 0.0 V / 0.13 V (cycling)
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 0.26 V / 3.28 V (cycling)
1. GND : -
3. B13V: 12.68 V
5. B13V: 12.68 V
7. Vamp: 12.68 V
9. Vamp: 12.68 V
11. GND: -
13. B5V: 5.28 V
15. B5V: 5.28 V
2. OD_ON: 8.42 V
4. PWM_DIM: 2.82 V
6. N.C.: -
8. BLU_on/off: 2.12 V
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 3.3 V
3. B13V: 12.68 V
5. B13V: 12.68 V
7. Vamp: 12.68 V
9. Vamp: 12.68 V
11. GND: -
13. B5V: 5.28 V
15. B5V: 5.28 V
2. OD_ON: 8.42 V
4. PWM_DIM: 2.82 V
6. N.C.: -
8. BLU_on/off: 2.12 V
10. GND: -
12. GND: -
14. A5V: 5.28 V
16. Power on/off: 3.3 V
This time instead of just swapping out the mainboard and expecting the owner to come back in six months just because the same fault appeared again, I'm more interested in trying to find the fault on this mainboard.
Any suggestions on this? Are the caps in the pictures already considered to be bulged or do they look normal? I did try to reset the EEPROM with shorting M_E_SDA and M_NRESET without luck.
The owner told me that the TV did throw the circuit breaker the last time it worked and after he came back the TV showed this behaviour. He's not sure the TV caused this and since the fuses on the PSU are ok I don't worry about that.
I probably forgot something so just ask. I'm open for any suggestions.
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