Official Samsung LN-TXX61F/65F/66F Owner's Thread III - with *updated* first post. - Page 638

Originally Posted by axmode

Wow, it has been a really, really long time since I have been in here and my 4661 which is now almost 2 1/2 years old, has suffered from this very exact fate

It had also happened a few month ago, but it finally came back on after a few minutes of messing around. This time, it has been an overnight affair and still no video (image) but there is audio (sound).

I will unplug it for a few hours to see as to if this hocus-pocus would work, but if it does not, I may have to call the repair facility. The TV is mounted on a TV console thingy, but if you guys think that I should bring it down and inspect the Caps first, I'd take a chance on that before I delve into the more expensive repair options!. I am relatively good with light electronics repairs and maybe able to swap out boards too.

Bottomline: Currently no picture, but have sound. Never had the random flashes of any of the primary colors.

TIA...

Originally Posted by black_macleod

I think it would be worth your time (and money) to check the caps first. Seems to be the one thing consistent through all our problems .... it can't hurt anyhow, at least you'll rule it out and it won't take all that long.

Originally Posted by mdreyno

check samsungparts.com
I think they're official, and their rates appear to be somwhat reasonable. IDK if you'll be able to get the exact version of the board you're looking for through their site, but it'll give you a good price guess.

Originally Posted by corkst

Hello all - PLEASE HELP,

I own a 46" samsung lcd tv (LN-T4661F) which just turned 20 months old. Til now, it was watched very infrequently (maybe 6 hrs per week). When powered on, it functions normally for about ten minutes before the picture goes black, but continues with the program's audio. Changing source/powering the set off and back on again does not rectify the issue, black screen with sound continues. I uplugged the television from the power outlet overnight, plugged it in and powered it on the next day, when it again functioned correctly for 25 minutes before it again reverted to black screen with sound. Additionally, I can immediately power the tv off and back on again, and the picture will again come back for a minutes before again going to black screen with audio.

As the tv is out of warranty, Samsung was not willing to do anything nor would they admit to this being a known issue despite the multitude of people reporting/blogging about their same experiences. They say to call tv repair and provided me with contact info to their samsung authorized repair center.

I have done much reading and learned that faulty capacitors have proven to be the cause in many cases of other LCD Samsung televisions.

Although the capacitors appeared fine, we changed the the five commonly found to be the issue for others. Unfortunately, our problem remains, power the tv on, we get picture and sound for 10 - 20 minutes before the picture goes black and sound continues.

Called the samsung certified repair guy who thinks that if it was a power board issue, the tv would likely not come on with picture at all, he seemed to think it may be related to an inverter issue. He quoted the costs associated with the repair would amount to $240 labor (according to him was a $20 discount, since Samsung would pay him $260 for in warranty repair labor) plus the cost of the parts ($100 per inverter). I scheduled a pickup with him, which was to take place either Monday or Wednesday of last week, however, he 'no-showed' either day, nor called to advise/reschedule.

Can anyone offer any advice of which way I should go, not really interested in spending alot of $ to repair the tv which will still be substandard, when I can purchase a new, better quality tv for not much more. I can order an ip board for approx $120, but am reluctant to throw good money after bad if in fact the board is not the problem.

Originally Posted by taphil

Is the TV plugged in via HDMI? It sounds like an HDMI handshake problem which I had with the 4665 and a Comcast Motorola cable box. The picture would drop out randomly after random amounts of time. However, connected via DVI to my HTPC or HDMI to a DVD player did not have the problem.

It was fixed by replacing the main logic board, not the power supply board.

Originally Posted by taphil

Yes, same as motherboard. The TV has two boards, one is the power supply board (many pics posted in this thread) and the other is the logic board (which runs the TV). I think I've read that on some TVs the metal cover for the power supply board is removed (it's present on my TV in the pic below, which BTW is still functioning fine since I bought it when the model was first introduced).

I don't know where to find the boards, but I'd do a forum search to be sure that it's the logic board causing the problem. I remember reading about it before which is how/why I got my board replaced years ago. Basically, what would happen is that the picture would randomly drop out due to a HDMI handshake problem, which I think occurred for me only with a Comcast Motorola cable box but not other sources.

Originally Posted by dante07

The operation was a success!! I actually replaced 5 Caps instead of three. The TV turned on faster than ever. I also notice that changing channels was a bit more fluid. Could bad Caps slow the changing of channels?

Originally Posted by Hennepin

After reading through this and similar threads we quickly figured out that capacitors are the issue. The back was popped open and the culprits identified and pulled. The next issue though is where to get properly sized replacements. The local electronics suppliers don't carry what we're looking for, even the official Samsung repair shop (they say they've never received any parts from Samsung). It looks like I can get the same models from Digi.com, but if I pick those up I assume the TV will fail again in another two years.

If anyone has suggestions on good supply sites, I'm all fingers!

TV Model: 460PXN
Capacitor 1: 450wv (increase to 900), 150 uf, 105º C
Capacitor 2: 25v (increase to 50), 1000 uf, 105º C

Originally Posted by JediRob

So just to follow up my repair was successful.

I would urge anyone experiencing these symptoms to try taking care of it yourself and saving you tons of money and aggravation. And also getting quite the sense of satisfaction!!!

This was the symptom, along with the looping startup.



Blown capacitors along with new ones.



Successfully installed. First time soldering.



TV is currently moving along just fine.

Originally Posted by shadowlock

Hey thanks for the pics--First image is EXACTLY what my set (Samsung LNT 4065f) is doing (just without quite as many pink pixels). My TV is still under warranty (bought the extended warranty from Sears where I picked up the TV, so I called them and they are sending a repair tech. out.).

I intend to print out this post to show it to the tech (although I think they're replacing the whole board). This is really helpful! Thanks!

Originally Posted by sprowe

I have a 4665F with HDMI issues that is no longer covered by the warranty. I would like to try upgrading the firmware before paying a technician to come fix it. Can anyone please tell me if the firmware files are still available? The links at the top of this thread do not work anymore and Samsung help line was a dead end. Google didn't find it either.

I would like to try 1037, but I think any one of the later update will be good.

Originally Posted by taphil

I have the 1032 and 1037 firmware files I used to upgrade my 4665 with a 1008 board (both referenced in first post of this thread).

I can upload them somewhere if someone gives me instructions. I know nothing about public uploading sites and don't want to register or anything.

Originally Posted by taphil

Ok, here's 1037

http://www.mediafire.com/?ry3tnltu1oz

Beware, as the post #1 mentions, of the risks. Also, sets produced later on have a different board which were entirely different and don't use the above firmware.

Originally Posted by avneebie

O.K my LNT4665FX has the HDMI issue with the picture cutting out. Tried to download the firmware on the first page and no good.. Tried searching and nothing. Anyone still have the firmware/download available? Thanks.