Question about Samsung HCM4215W 42" Rear Projection Television

5 Answers

My samsung HCM4215w tv keeps shutting off every ten to 15 minutes. How do I replace the power cord. Rai

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  • 2 more comments 
  • raileadmen Jan 02, 2011

    1) tv is 6 yrs old

    2) No noise

    3) Picture is fine


    Rai

  • raileadmen Jan 02, 2011

    Samsung HCM4215 projection - 5years old
    Shut off every ten minutes red timer light blinks. Picture is fine makes no sounds.


    1)Tried unplugging tv it did not remedy problem
    2) tried to locate temperate sensor could not find it

    Rai

  • raileadmen Jan 03, 2011

    I looked in the back of the tv and there are'nt any fans. How do I replace a capacitor?

    Rai

  • raileadmen Jan 03, 2011

    What is the LED.??????? The timer light blinks.

    RAi

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5 Answers

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  • Samsung Master
  • 11,800 Answers

This has nothing to do with the power cord. The tv shuts down because a part (or the soldering to it) fails when heated.
On a tv this old it's almost always the filtering capacitors from the power source: when heated they lose their filtering capacity so the voltage which they are supposed to stabilize becomes erratic so the tv's control processor crashes, shutting down the tv. This is how you replace them
http://www.youtube.com/watch?v=YCSNWi3UHf4
But you must inspect every single soldering in there, with a magnifying glass, to avoid some nasty surprises later on.

Posted on Jan 04, 2011

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  • Samsung Master
  • 17,129 Answers

This may not be the power cord as you think , if so the cord must have a poor contact with the mains plug which makes less contact heating the points to spark and cut off. If so use a low grade emery paper to clean the plug points of the TV. make sure there is good connection with the mains socket. if this is the plug , you can cut the plug off and install a new one.
However if you want to change the power cord, buy a good replacement type with the correct rating , remove the rear cover, take the power cord wires from the main board and replace.
Please check your power supply, the main mother board for possible DRY SOLDERING JOINTS that seems to cause this shut OFF's.

Posted on Jan 03, 2011

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  • Master
  • 2,509 Answers

Why do you think replacing the power cord will cure the problem? It most likely won't. The chances are that it is switching off due to overheating. Have you checked any fans fitted are spinning properly or are not blocked with dust. If ther are no fans there is probably a capacitor in the power supply needs replacing.

Posted on Jan 02, 2011

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  • Master
  • 4,889 Answers

This is not a power cord issue. Your tv is going into protect mode, which happens when something creates an overload on a circuit. My money would be on faulty capacitors.What is the status of the LED at the front when the set goes off?

Posted on Jan 02, 2011

  • eagle338
    eagle338 Jan 03, 2011

    You did not tell me what is the status of the LED at the front? Please provide this info so that we can check whether the self test diagnosis is able to detect the fault. It will make our job a lot easier.

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  • Master
  • 10,515 Answers

Hi,

This is an internal failure. This is not a problem with a fuse or power cord. This is really common on this set. Before we proceed further, wanted to have few more details :-

1. How old is the set?
2. Any noise that you hear?
3. Is the picture is fine when you turn on the TV?

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Jan 02, 2011

  • taran_2005
    taran_2005 Jan 02, 2011

    Thanks for your response!!

    How long ago you have changed the bulb?

    Be advised that as i am not there, i could only present few possibilities that you need to eliminate after inspecting and testing the TV.Other than this, it could be an issue with power board/ deflection board / main board. If you have the TV repair experience, revert and i could provide few pointers that would be helpful

    Let me know,so that we could proceed.

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!

  • taran_2005
    taran_2005 Jan 02, 2011

    Thanks for your response!!

    You are most welcome to consult other experts, however there is no temperature control. This is a common problem. I am not sure, few questions :-

    1. How did you determine power cord as a fault?
    2. Temp control sensor????

    I am sorry, however, speculation is not a solution for TV repair.I wish it could have been a simple solution. I am even willing to help you to get this repaired if you have any repair experience. The only reason to respond is to make sure you does not do anything that would either damage the TV or YOU.These are not flat panel TV's that you could easily open and repair. In my country, we usually have a certificate to perform repair on these TV's.

    Hope to hear from you soon.

    Thanks and Regards
    taran_2005

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When I was watching TV today my Sony Bravia KDL-40V4100 just swutched off by itself. After 15 minutes or so it came back on by itself, I shut it off soon after. Later on today after watching TV for 15...


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