Connect with us

Norcent 42" Plasma TV

Discussion in 'Electronic Repair' started by Chris F., Apr 28, 2010.

Scroll to continue with content
  1. Chris F.

    Chris F. Guest

    Someone recently brought in a Norcent PT4235 plasma TV. It had apparently
    "just quit". When I plug it in, the relays click a couple of times like it's
    trying to start, and a bit of static flashes on the screen, but that's it.
    I looked under the back cover and didn't see any bulged or leaking caps,
    nor did I find any obvious shorts in the many high-wattage transistors.
    Before I go any further with this, I'd like to know if there are any known
    issues that someone could point me to. This set has a massive number of
    power supplies in it, and I really don't want to waste several hours on
    something that may not be fixable in the first place. This is a very cheap
    brand of set (retailed for just $700 new), so I doubt it's worth spending
    much time on.
    Thanks for any advice.
  2. It's a slim shot, but you might try (when powered down) measuring resistance
    from the output side of all voltage regulators and rectifiers looking for a
    short to ground. (Often the rectifiers are TO-220 packages).
    Saved my ass once recently. A Samsung plasma with power supply issues - and
    the board no longer available from Samsung. Robbed a TO-220 rectifier of the
    same type off a scrap board.

    Mark Z.
  3. Guest

    A common cause of this problem is a shorted sustain card. This
    appears to use an LG panel. One troubleshooting method on these
    panels is to unplug the TV, disconnect the cable linking the power
    supply to a sustain card, then plug the TV in again and see if the
    power supply turns on. If that didn't help,disconnect the next
    sustain card.

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day