20 Most Recent Samsung LE40R74BDX 40 in. LCD Television - Page 4 Questions & Answers

Try this method :
1. Menu, select setup
2. Plug and Play
3. Enter pass code by entering 4 digit number (0-0-0-0)
4. Select language
5. Switch to Home Use
6. Follow the instructions.
Good luck.

Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

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.

Check in the tv menu look for the OPTION go down look for PROGRAM TITLE DISPLAY to turn it off.

press menu. picture options. set digital noise filter to auto. and mpeg noise filter to auto.

my tv keeps clickin and will not switch on

There will be some large PHILIPS HEAD screws on the back of the set where the base meets the tv set.

You will have to lay the tv set down (screen side down) on something soft like a bed so you don't scratch / damage the screen.

Remove the big screws (should be 3 or 6 of them) then pull gently down and back on the base and it should slide right off.

Rescrew the screws into the holes in the tv so you don't lose them.

That should be it.

Good luck and let us know how you make out.

Check ur Sleeping timer modes,see it is not on like 30,60,120 mins?If ur Sleeping timer modes is off.Than ur tv power supply board is the causes and the problems,it not consistinly giving ur tv the right voltages anymore that why ur tv it turning off intermittently.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Tv power supply board is the causes and the problems.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacemnt.

If you go to the menu, there should be a symbol for the headphones and a symbol for mute.
Make sure they are set the correct way around because the TV sound may be muted leaving the headphones live.
Hope this helps.

Hi,

The first thing you should do, is connect the Samsung TV to one of the working aerial inputs upstairs, and then run the auto-setup / digital channel scan. If it works, it's most likely a localised problem with the aerial cable - or you accidentally selected a different external input.

Try this simple test first and then post back with the results. I will then try to assist you further.

This is a common problem with this model and typically due to failed capacitors in the power supply Karen. More info:

Repair Article: http://www.earthinfo.org/samsung-tv-makes-a-strange-clicking-sound/

Replacement caps: http://www.electronix.com/television-repair-capacitors-c-16_68.html

Hello,

It's the problem of overheating in the power supply board of the TV.on the power supply board of the TVhere are few capacitors and IC.any of this IC is got short or may be weak.so due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop.

Hope this help in solving the problem.....

HI
It is not 2 screws as the instruction says it is a row of 3 screws,
It took me a while to work this out as well The 3 screws are easy to see.

Hi,

This is an internal failure and quite common on this model. It could run like this for 7 - 8 months or even more than that. This is a fault either in power supply board ( bad caps ) or bad panel.If you call a repairman, he would directly order the board and it would cost you $300 - $350. If you have electronics repair experience, could read schematics and would be able to keep all precautions, i could tell you where to tell you where you could buy a service manual and would be able to guide you to fix this.

Let me know,if needed further assistance.

Hope i helped you.

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