20 Most Recent Samsung LN-S4051D 40 in. LCD Television - Page 6 Questions & Answers

The noises you heard were caused by the power source being overstressed by a failing part - at that moment the source has been capable of barely compensating the failure. Unfortunately , because you kept using the tv, the failing part failed for good and , in the process of doing that, it shorted other components. This short is now detected by the protection system of the power source and it has shut it down - the blinking of the status light is the way in which this is signalled.
There is nothing more you can do - the fault has become too complicated for an inexperienced person to fix. Unplug the tv from the wall, call a repairman and expect a stiff bill - at least $250.

The only thing you can do is to file the complaint with SAMSUNG and contact them. I will doubt it very much if they will do any repair for free, but that how TV companies are running the business these days, poor support that is what you will get.

http://www.samsung.com/us/support/

Please leave rating if it helps.

I am having the same issue with my 52" Samsung ... it just started recently and it appears to be cycling the inputs after it powers on ... is that what yours is doing too? Please let me know if you find anything out and I will do the same ... sneye_per at the yahoo 8)

Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

I have a similar problem, while searching internet, came across a solution maybe. Its the inverter board. the inverter board controls the picture in the flat screen televisions. Board may contain a power source capcitors, similar to the ones on the power board. I had changed the capacitors on the power board two years ago, capcitors from Radio Shack $ 1.67 each, vs. techincian $ 550.00.

You may want to also check YouTube, which shows you how to change a inverter board, cost of board ranges $ 55.00 to $ 105.00 on ebay. You can also just change the inverter on the board, may take some work on your end. Some samsung tv have two (2) inverter boards.

Good Luck

Sony 1080p LCD 120hz at Sony Store $ 490.00, 24 mths no interest. Christmas special

I am here to help you solve the problem, not trying to sell you parts that you may or may not needed.
Please read my guide first to get some understanding.
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 Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Parts: www.shopjimmy.com

Please post back what you find.

When the picture goes off, do you still have sound? Please clarify this info so that we can continue with the diagnosis.

Sai.

Power Supply needs repaired. Not expensive.

i got the same problem in Samsung LNS4051D, it would not turn on and the power LED would blink 4 times and the relay would click and this would repeat again and again. It need to replaced/repair power supply. after that it works fine, but it need to handle technically...
hope it helped, if so do rate the solution

It can be T-CON board, 24vdc power supply, backlight inverter board, main 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 Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums 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. Please post back what you find.

there is problem with main baord.some of part over heated.

Hi, I think this is the same problem as I've just had on mine, and seems to be very common among Samsung LCD TV's. I'd take the back off and examine the capacitors on the power supply board (just follow the wires from the mains input) I found two capacitors that had bulged at the top (if you look at a normal cap, it has a flat top).
I replaced these for just over a quid and the TV's now working fine again.
HTH

Look for bad caps with leaking/bulging tops first in the power supply module. http://www.shopjimmy.com/catalogsearch/result/?q=Samsung+LN-S4051D


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 Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums 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.

I hope out talented expert would have been provided you correct and helpful info in chat session by consulting related schematics, please feel free to ask further help if required.
Thanks.

Most likely problem is bad capacitors in the power supply. You wiil see that they have swollen ends and may have ruptured/leaked. Try googling "bad caps" and you'll find numerous sites that will tell you, and show you, everything you need to know about this problem.

Most likely failed capacitors in the power supply. I recently had the same problem with my 26 month old Samsung LN46A750. Samsung paid for the installation of an upgraded power supply board.

http://www.thebuzzmedia.com/samsung-tv-capacitor-clicking-issue-and-free-repair/

http://www.avsforum.com/avs-vb/showthread.php?t=1198409

The audio amplifier from your tv has just died - it happens. You need to open the back cover, locate the amplifying IC, unscrew the radiator from it, unsolder the IC, buy an exact replacement and solder it back.

Have you looked at the Infamous Capacitors? Pull the back off and see if they are bulging on the top of the caps.

You probably won't like this but that is going to require a shop visit to fix. It is a failure in the hdmi section of the receiver. You won;t have warranty so you want to check around an get estimates.You may also want to shop around and see what a replacement tv is worth. Figure on the repair to cost about $450 if the shop replaces the board. If they actually repair it (or can) then it might be under $150ish.