20 Most Recent Samsung LN-S4692D 46 in. LCD HDTV - Page 6 Questions & Answers

Hello, I just answered someone else with the similar problem. I don't know if this will solve your issue but you can at least rule it out.
I have a different brand flat screen that had the same problem. I would turn it on and it would play for few minutes (sometimes even an hour without a problem) but then it would suddenly turn off and it would take some time until I could start it back again.
I've checked the internet, called the company and finally decided to take it back to the store.
Then I discovered the problem.. It sounds ridiculous I know but the electricity plug where it connects to the TV was faulty. So my TV would be on, then it would just go off due to lack of power. After discovering this we fixed the cord and for months now it's been working fine. It never turns off by itself anymore.
Maybe the same thing happened to your TV which is a very easy fix, so take a look at the cord before you send it in for repairs.
Good luck :)

In most cases it is the capacitors in he power supply section that have gone out.

Common symtoms are
-shuts down
-takes a long time to come on
-relay clicks
-dead set

You can get capacitors online or you can get a complete kit with instructions and support from www.TvRepairKits.com . Its a failry easy DIY fix.

it the samsung getting an Ip address on the tv?

Replace the power supply, the transformers either went bad or the power supply has a bad circuit not letting the back light come on. I fix these problems on the samsungs all the time.

Power supply? Need troubleshooting first.
The T-CON board fuse will be the first place to look, you need to find out if the T-CON board is receiving the 12vdc from the main board first.
See example of dead T-CON board.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Please see my basic troubleshooting guide here: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com just make sure to use caps with low ESR, 105c rating such as PANASONIC FM or FC series. Please post back what you find.

The t-con board is located at the top-middle of the set. I have enclosed a picture of what they look like.

There is T.con board use as a output for LCD panel.Input come from Main board. One power supply board and invertor board for back light.Thats all have in side LCD TV.

Have a Samsung LE40B551A Problem is sound and no picture. When I turn it on I get picture for about 2 seconds, then black screen. I'm in Ireland, set is from the UK, and sadly just a few months out of its one year guarantee. Any help appreciated. Is this a serious fault, or is it possible I can fix it. Have some experience soldering, small projects, but not TVs

The power supply boad is dead.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Sounds like a failed or at least failing power supply / power board inside the TV. Unfortunately this is a very difficult repair, and unless you are an electrician I would not recommend attempting it. You will need to contact a local TV repair person in your area. I am quite certain that is what it is, that is exactly what the blinking power light indicates. It is getting enough power through the power supply to light that little indicator light, but it can't power up the TV itself.

This is the most common problem with all LCD tv's unfortunately, and for whatever reason it is very common in Samsung models :(.

So sorry that I don't have better news but it is definitely a power issue internally.

Thanks
Tim

Call Samsung Customer support. Some of these sets are being repaired on a one-time courtesy basis.

U have basic electronic skills?Have all the tools?Take the tv aparts,the board where the power a/c plug into it.That the power supply board,check for these parts call capacitors,it dying about to fail,that why it take power longtime to come on.These capacitors parts on the power supply board are alway bulges up on it tops or puffing up on it tops.This capacitors are dying and leaking.Replaced these capacitors,will solved ur delaying power up tv problems.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Go here:

http://www.youtube.com/watch?v=Mm51C_RDIZE

How old is this tv?
If tv is 2-3 years old then it might got problem in power supply board, specially few capacitors got defective in output section, replacement of bad capacitors will solve the problem.
New power supply board is also available with Shop Jimmy on reasonable price if you want to replace complete board.
Click above link to see power supply board image and price info.
Let me know if you have additional question.
Thanks.

I am now having this same exact problem.
Apparently there are 4 boards that can be the issue. BUT you must bring it to an Authorized unauthorized service center to resolve the issue. I brought mine to an unauthorized service center and they can not buy the part. My particular issue is a TCOM board on the back of the display which only authorized dealers can buy. In fact if an Unauthoirzed dealer calls up the J&J Samsung parts distributor J&J doesn't even have it their parts inventory so as far as they know the part doesn't exist. which it does you just need to call an Authorized part dealer in your area which you can get the number from 800 SAMSUNG

There are 4 boards unauthorized service centers are allowed to sell 2 PC BOARDS
1 POD PCB
1 Power PCB

When you call Samsung get a CLAIM nuber...

WHAT A PITA

Check the power supply first for bad DC filter caps, that will be the starting point.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/

Please post back what you find.

There may be a temporary residule image left on the screen but it should disappear within a few minutes. LCD screens do not "burn in" an image like the older Plasma's would.

Th clicking is from the power relay. You will have to open it up, the first place to look will be the power supply module, look to see if it has any bad caps with leaking/bulging tops first, caps can look OK but can be bad due to high ESR.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com