Question about Toshiba MW24FN1 24 in. TV/VCR/DVD Combo

2 Answers

My MW24FN1 (-R), all of a sudden turns off when I turn it on. Yesterday, I turned it on, heard a single word of a program voice and it turned off. Turned it back on, and instantly it turns off....over and over again, no matter if I use the remote or the power button on the TV.

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  • Corky Akins Mar 23, 2011

    Is that the only feedback I am going to get on this issue? Does anyone else agree with this diagnosis?

  • Corky Akins Mar 23, 2011

    Is this something a lay person can do? Can't say I have ever worked on electronic stuff other than ram changes on a computer, but if is just something with tins that plug in, I may give it a shot!

  • Corky Akins Mar 24, 2011

    Thank you so much for an excellent response to my issue!

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2 Answers

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  • Toshiba Master
  • 6,993 Answers

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.

Posted on Mar 23, 2011

  • Walesarumi
    Walesarumi Mar 23, 2011

    Hello,

    it has nothing to do with plugging in anything. It has to do with soldering things on the power supply board. Capacitors and other components on the power supply board are soldered. If you are not sure, then maybe you should give this task to someone who can. But can can still give it a shot. Unscrew the TV back cover and check the power supply board. If you cannot do anything on it, you can leave it for someone who can help you out. Good luck again......

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  • Master
  • 4,472 Answers

Hi,
This sounds like an issue with the power supply. Could be the over voltage protection shutting it off right away. Given the age and size of this television you may want to consider replacing it.
Thank you,
Lee

Posted on Mar 22, 2011

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