UE40D5000 red led blinking (PSU, Main board and T-con changed)

[wilecoyote]

Hi all,

I have an UE40D5000 that does not start and the red light is blinking... I can also heard a sound that seem to come from T-con board or panel :s...
I changed the PSU, the main board and the T-con board, so I'm without new ideas!
If somebody has any idea on what I can do to solve this problem ??

[tom66]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Does the light blink continuously?
If you disconnect the T-con LVDS cable, does the light blink then go out?

[wilecoyote]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Yes it's blinking continuously...
Led stays on for 2 or 3 seconds then blinks several times...

It's the same if I disconnect the TCON LVDS cable.

[tom66]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Ok, disconnect the cable between the main board and power board. Does the backlight come on?

[wilecoyote]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

No, the backlight stays off... Should I search for a backlight problem ??

[tom66]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

To me that indicates backlight fault (power board or LEDs inside panel)

[wilecoyote]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Ok. I already changed the power board... Do you know if it's easy to test/change the LEDs inside panel ??

[mmartell]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Not easy but doable if you're careful. I have a thread here on a un55d6000 in which I did just that. Good luck.

[tom66]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Seems D-series is bad for panels and bad for LED failures, both difficult to fix (panels impossible in most cases.) Ah, Samsung...

[wilecoyote]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Ok... Thank you guys!!! So, nothing to do anymore with that... I will try to fix the LEDs anyway... I think I have to carefully open the panel :s
mmartell can send me a link to the post you're talking about ??

[tom66]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Here, I believe...
https://www.badcaps.net/forum/showthread.php?t=34566

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

prejudice to unite myself to the problem I also have a similar problem ...not only lights the red LED flashes
just that to me pulling the cable the main board and power board. the backlight is on ... come on a regular basis
you have tips? thank you in advance
sorry for my bad english

[ReeceyBurger123]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Images of the boards ? I had the C series blinking Led and restarting failed Bga solder on the mainboard Cpu.

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

thanks for your answer

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

help me...

[ReeceyBurger123]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

Ok firstly have you started checking the main voltages from the Psu ?

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

ok I start to work and let you know as soon as possible
thanks

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

these are the measured values

2.1.pwn_dm ------ 12.46 / 13v
4.3.n.c -------------12.46 / 13v
6.5.blu_on/off --------- 13v
8.7.gnd -----------------
10.9. gnd ----------------
12.11. a5v ------------- 5.36v
14.13.5. power on/off ---------------- 5.36v

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

I have to check more

[labo555]

Re: UE40D5000 red led blinking (PSU, Main board and T-con changed)

ADD THAT LED just connect the power supply flashes six times