Tuner problem

Discussion in 'DM800HD Hardware troubles and Repair support.' started by mangy, Oct 27, 2015.

  1. mangy

    mangy New Member

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    Hello,can anybody help me,i have a dm 800 hd and when i switch the box on i get a frozen picture from a channel i was watching before i turned it off and it says ( service unavaliable check tuner configuration) so i reboot and it works ok untill i swich it off again and on it comes up with the same message,i have tryed another tuner and still the same problem,tryed ifferent images still the same.
     
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Mostly a cpu issue, or a voltage to weak as the 1.3v or 2.6v.
    Check the main voltage,

    [​IMG]

    And if they are fine, see is there is a ohm value that is incorrect.
    These ohm values are measured between the ground, and the measuring pin.
    It shows measurements from three motherboards.


    [​IMG]

    Nevertheless, it's not the tuner, then it is mostly related to the cpu, or the cpu itself, of a unstable voltage to it.
    As for the cpu, check if it helps when you cool it down with a temporally fan.

    Please note that ...

    This concerns the regular older motherboard, for estar or newer type of motherboard you need other measurement.data.
     
  3. mangy

    mangy New Member

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    Hello Johnny B,thanks for your reply,first I do not have a voltage reader to check and I have a fan under box to keep it cool,if it is the cpu can it be reparaied and do you repair the box if I can send it to you.
     
  4. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    The replacement of a new cpu on a 800HD is a costly process, and rather difficult to perform.
    I myself do not do that because the success rate is too low.

    Obviously, I'm willing to do a research on the motherboard, and repair if possible.
    Only I am very busy with the repair work, the waiting time is currently 4 to 5 weeks.
     
  5. mangy

    mangy New Member

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    Ok,can I come back to you on this,would you need box know or later.