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I have a Sanyo hln567w. When it is turned on, after a few minutes the screen freezes up, goes black, and the only way to turn the TV off is to unplug it. The green light at the bottom flashes. I have had the bulb and balyst replaced, it did not help.

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  • clintt Sep 03, 2008

    The problem still happens even after replacing the ballyst. The tv will turn on and has a picture. After a few minutes, it will go black and I have to unplug it in order to get it to turn off. The button on the side and the remote will not turn it off.

  • clintt Sep 04, 2008

    thanks

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  • Master
  • 19,396 Answers

If you had picture, there was no need to replace lamp, that is an expensive part.
Regarding ballast , before replacing you need to test voltages on it, this is an hazardous procedure that must be performed by a technician.
The problem it is some faulty component on one of the internal pcbs, can be a faulty IC , a capacitor or any of the several thousends components inside your TV.
Often, for example you get same problem from the high voltage board powering the bulb.
You need to have a repairman diagnosing the problem before buying more parts.

Posted on Sep 04, 2008

  • Ginko
    Ginko Sep 04, 2008

    I forgot to mention that the TV is turning itself off because the chip controlling your tv activate the internal safety switch after detecting an error (overvoltage , shorts, faulty component etc.).
    The safety device will put TV on standby and stop normal TV operations, that is what is happening to your TV.


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  • Master
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This is a problem that still occurs after you replaced the balast? does the picture come on at all? or after a few minute of clear picture it goes blank.

Posted on Sep 02, 2008

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For removal and Installation of the DMD board I would reccomend a tv service person because it is in the heart of the television and there are some adjustements to be made when the new board is installed.
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Component level repair would require some experience in desoldering and soldering SMT,SMD , and or surface mount components.The actual components are about $15.00 total so just repairing your board should cost about $125.00 by a qualified servicer (if you were to remove and install it yourself). This DMD board is used in many models and can a few common problems.
HLM437W HLM4365W HLM5065W HLM507W HLM617W HLN437W HLN4365W HLN467W HLN507W HLN50665W HLN567W HLN617W ( L2 and L5 chassis )
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-horizantal tearing, distortion , flippnig , solarization , red picture, leading to blank screen and lockup.(tv menu would be affected by all picture defects).
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