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VCR won't turn on after brownout

Discussion in 'Electronic Repair' started by [email protected], Apr 10, 2007.

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  1. Guest

    We experienced a brownout last week, during which we hurried around
    the house and unplugged everything sensitive.

    Afterward, everything came back up fine except for a Panasonic PV-
    D4744S DVD/VCR combo. It refuses to turn on. I opened up the case to
    see if there was any obvious damage, but everything looks fine, even
    the 125V/3A fuse appears intact. Anyone have any ideas what I can do
    besides replacing the unit? It's only a couple of years old, it
    wasn't terribly expensive but it's a shame to have to throw it out
    already.

    Thanks
    Ken
     
  2. Meat Plow

    Meat Plow Guest

    Have you ever fixed a switch mode power supply? Have you every fixed any
    electronic component or device?

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  3. Sofie

    Sofie Guest

    Ken:
    "everything looks fine" ..... bad parts don't always burn up and look
    bad... they need to be tested and replaced by a tech who has the correct
    test equipment and know how to troubleshoot...
    The symptoms you reported are common, especially after power outages and
    storms... and either are easy and economical to repair or sometimes not
    worth fixing but the only way to know is to take it to a repair shop.... my
    shop does these types of repairs all the time and in about 8 out of 10 times
    the repair is economically feasible.
    So, don't toss it until a tech looks at it... since knowledge, time and
    parts are not free there may be a charge for an estimate without a follow-up
    repair... or if you have it repaired, any diagnostic deposit you may be
    charged would apply to the repair invoice. Check with the local repair
    shops in your area.
    Daniel Sofie
    Electronics Supply & Repair
    - - - - - - -
     
  4. Guest

    Thanks for the advice Daniel.

    -Ken
     
  5. b

    b Guest

    if you know what you're doing, change the low volt capacitors in the
    power supply as these are the probable cause of what you describe -
    very common.
    -B
     
  6. Meat Plow

    Meat Plow Guest

    Common when the unit is exposed to a brownout?

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    #1 Offishul Ruiner of Usenet, March 2007
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    Pierre Salinger Memorial Hook, Line & Sinker, June 2004
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  7. I'd go check that zener diode in the power supply that always shorts and the
    IC protector attached to it
     
  8. Pull the power cord and leave it off for 24 hours. That won't cost anything
    and sometimes works.
     
  9. James Sweet

    James Sweet Guest


    If you have a multimeter, soldering iron, and the inclination to learn a
    few things you can probably fix this, but you'll have to get in and take
    some measurements. Bad parts usually look just fine.
     
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