Trouble with Samsung LCD LNT4671FX/XAA

[scales11]

Hello,
I have a Samsung LN-T4671F(LNT4671FX/XAA) and am having some trouble getting it to turn on/display/respond. Basically, it turns on, the IR (power light?) and source light flash for a bit I can see that the backlight is illuminated, but it does not respond to any button presses on the remote or TV. I can turn it off, but that is it. Also, I noticed that if I press buttons on the remote, the IR light (power light?) illuminates with each press.

I have read many many threads about the Samsung capacitor lawsuit (which I think I missed the window for) and I know my TV was one of the problematic models. After calling Samsung and getting no help from a clueless idiot who probably doesn't know what a TV is, I decided to open it up and take a look. I am a tech-savvy do-it-yourself kind of guy and immediately noticed that one of the problematic capacitors was bad (or looks like it).
Image 1:
http://1drv.ms/1BVYdQS

So I ran over to Fry's and got a comparable replacement (original capacitor was 2200uF-10V and I bought a 2200uF-25V). Physically, it was a little bigger, but with some careful de-soldering, I managed to replace the bad capacitor.
Image 2:
http://1drv.ms/1Bl3eAm

Unfortunately, the problem remains after the replacement was installed:
Video 1:
http://1drv.ms/1Bl3jEe


I know that my TV's behavior is slightly different from the blinking red light and clicking that others are reporting. Can anyone offer some advice? Should I replace all the capacitors in that cluster even if the look OK?

[budm]

Re: Trouble with Samsung LCD LNT4671FX/XAA

So you do have backlights but no image on the screen?
Then you need to find out if you do Voltage at both ends of the SMD fuse (chassis as GND ref.)
Did you use the correcct type of caps for replacement?
They must be LOW ESR types not general purpose type.
Bad cap can look normal, I also replace all the caps except the main fileter caps when I do the repair.
I did not look at the video, it takes way too long to load.

[scales11]

Re: Trouble with Samsung LCD LNT4671FX/XAA

Thanks for the reply

1. I have only replaced 1 capacitor so far. The original dead one was a 2200uF-10V and I replaced it with a 2200uF-25V. It is not a low-ESR but is rated for 105*C (it says LHK on the capacitor)

2. The backlight works, but the screen remains black.

3. I am contemplating replacing the other 4 capacitors to be safe.

4. New link to video (youtube)
https://www.youtube.com/watch?v=j_mr...ature=youtu.be

[budm]

Re: Trouble with Samsung LCD LNT4671FX/XAA

OK, I saw the Video, that looks like when the panel is bad. I would try connecting the flat cable from the LCD panel to the T-CON board one at a time to see if you will get good picture on section of the screen.

[scales11]

Re: Trouble with Samsung LCD LNT4671FX/XAA

I unplugged both LCD flat cables and plugged in one at a time. One of them did not make a difference, and the other gave me this:

[budm]

Re: Trouble with Samsung LCD LNT4671FX/XAA

Hmm. From my experience of what I see on the screen with all the cables connected is due to the panel, I did try new T-CON when T-CON is chap enough to gamble on just to see if it will fix the problem but I never have luck fixing it with new T-CON. You can try T-CON if it is cheap enough.

[scales11]

Re: Trouble with Samsung LCD LNT4671FX/XAA

Well unfortunately a new t-con board did not help. Any other thoughts?

[budm]

Re: Trouble with Samsung LCD LNT4671FX/XAA

The panel is bad then, as I indicate in post #6.

[scales11]

Re: Trouble with Samsung LCD LNT4671FX/XAA

Bummer. Yes I did understand your last post, I just wanted to see if there was any other thoughts that people had.

I suppose replacing the panel is pricey....?

[Alastair E]

Re: Trouble with Samsung LCD LNT4671FX/XAA

Replacement LCD panel complete--Cost More than a new set!

Time to break the sucker for spares....

[scales11]

Re: Trouble with Samsung LCD LNT4671FX/XAA

That's what I figured. Aside from eBay, any recommendations for selling the components?

Who wants them?

[Rudy.ALvarez91586]

Re: Trouble with Samsung LCD LNT4671FX/XAA

I have the same exact tv with almost the same problem when it started out you have a source light blink code and your power light blink code that means that have a power board issue and the source blink code means it is the main board but i would tackle the power board first
what I did to fix mine is that i replaced the 3 of the same value caps with 35v rubycon caps that where the same value i got nothing then i saw 2 1,000 smd caps that were bulging on the tcon board so I replaced it and presto i got a fully functional tv now the problem I have is that when the tv is warmed up and running for a while it starts to flicker with a horizontal line image splits in half so i am just going to replace all the caps on the power board and see if that cleans it up possibly just buy a main board