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Vizio E421VA no pic or sound

Discussion in 'Troubleshooting and Repair' started by HipMusic man, Sep 21, 2013.

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  1. HipMusic man

    HipMusic man

    Jul 8, 2013
    the tv was given to me for free to repair and either keep or sell. so im trying to repair it. i have replaced the power supply with what i believe to be a fully working power supply but there was no change. when i test the power supply the voltages are correct. however, when i test the voltage going out to the tubes (backlight) there is no reading. it says high voltage all around that area so i suspect there should be something on the meter. any ideas?
  2. davenn

    davenn Moderator

    Sep 5, 2009
    The tube's backlight ?

    is it a plasma screen ? a LCD panel ??

    LCD panel backlights often use fluro tubes with ~ 3000V supplies
    they will "bite" or kill your meter if you measure incorrectly

    have you google searched for a service manual or schematic ?

  3. HipMusic man

    HipMusic man

    Jul 8, 2013

    thats a lot of volts.

    not yet
  4. HipMusic man

    HipMusic man

    Jul 8, 2013
    i cannot find a schematic for it
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