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Question about Mitsubishi PD-4001 40" TV

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TV intermittently goes snowy.

Hi, I have a Mitsubishi TV that intermittently goes snowy. When we first turn it on it is snowy and blinks with horozontal lines for a few hours then is a crystal clear picture. Also, does the same thing sometimes while watching. Heres the wierd part, sometimes I can cycle through the channels in the TV not the sattelite and it will go back to normal. Also can watch DVD while it is doing this but not VCR. Please help no mannual or warrenty and can't afford a new one.

Posted by Tiffany Mitton on

  • Tiffany Mitton Jun 15, 2006

    Can this be self done? The Television is too big to move. Thank you. That is what I suspected in the first place.


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  • 53 Answers

Time for a new tuner probably about 150-200 bucks to fix

Posted on Jun 15, 2006

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Hi, I have a WS-55908 Mitsubishi tv, I turn it on

Do the self check this set has--when you turn on and power light comes on and then goes off:

On the front of the set press both the Menu and Input (device) buttons at the same time and hold them for at least 5 seconds and then release both buttons.

The power light will then blink a two digit error code--the most common is 2 blinks, a pause and 2 blinks---it will repeat it several times.

Let me know what you find and I will tell you what it means---based on your description I bet you get 2,2 error code.

If this has helped you rate this solution as I do this here for free.


I am geting a blink code of 1 blink followed by 2 blinks

Replace both of your STK ICs will have number on them call mats 1-800-628-1118 for parts they are big black ICs STK394-250 go by # on yours

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Fuzzy is a funny word. I never use it to describe a picture problem. That because fuzzy can go too many different ways. There is snowy fuzzy, blurry fuzzy, grainy fuzzy, and demodulated fuzzy. If the set goes out of focus intermittently that has something to do with the focus ciruitry. If it goes grainy that is a front end problem, usually tuner related. The other types of fuzzy are generally associated with problems in video processing some where. So, which is it?

Oh, and BTW that unit has three small picture tubes in it, one red, one blue, and one green. It doesn't have a 'bulb'.

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While watching tv, the tv all sudden goes snowy, no sound, and have to turn it off and back on to make it work again

Connect up another set right next to that set thats going out to make sure the cable or that line is not bad. It soukds as though you may have an intermittant tuner assembly inside the TV set. Its also a possablity that there could be a bad solder connectiuon in or around the tuner assembley. Not really a job for the user, as this set has hot and cold chassis, and can give a mean shock if you do not have the know how to work on these monsters. good Luck PS Please do not forget to rate this thread.
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