Question about Portable Televisions

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Have dec tv cannot get picture or sound will not auto tune

I have lent my tv to my sister which my son used only for his play station,never used for normal tv,no aerial,since my sister has taken it it wont do anything no picture no sound and of course I cant find the manual,I would say that he's been fiddling around with it but hasn't affected the playstation so we never noticed anything wrong hope you can help thanks regards kerri

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You mean to say is "dead set' .This kind of trouble is in power supply section busted fuse or busted regulator transistor ,or maybe no depected parts only brittle,loose,crack or cold solder joint of the circuit board...


Posted on Jul 23, 2008

  • LORETO LACARON
    LORETO LACARON Jul 23, 2008

    Coldsolder issues - each
    component is soldered into small
    holes on the printed circuit board which in turn connects said
    component to the
    other components. Due to time, heat, use, some solder joints would be
    cracked
    or loose. It is possible that the cold solder is still minimally
    connected
    (hanging by a thread). When the TV turns on heat would be
    generated which would
    be sufficient to further loosen up the solder joint to the point it no
    longer
    provides electrical contact. Jarring the unit creates movement inside
    enough to
    re establish the contact, sometime good enough sometimes not enough.



    Again, since the unit still operates (sometimes) then it is highly
    probable that there are no defective components. As you have surmised, it is
    possibly a loose connection, solder joints are "connections"
    except that molten soldering lead is used to attach/connect the component to
    the board, "loose connection" in this sense is equal to "cold
    solder".



    Again on the assumption of no defective parts, then seeking a more
    experienced
    buddy for the soldering might be to your advantage. This is of course
    in
    addition to the possible electrical hazards when repairing.don't forget to rate ;this is the only way i get paid for my works thank you in advance..

    Good luck:



  • LORETO LACARON
    LORETO LACARON Jul 25, 2008

    don't worry i will rate you so can become like me,and can solve cash premium solution..see you soon there.....

    good luck and regards,


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  • 25 Answers

Yeah, what VOTIT said.

Posted on Jul 23, 2008

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