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From: Chris F. on 28 Apr 2010 13:45
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.


From: PlainBill47 on 29 Apr 2010 14:24
On Wed, 28 Apr 2010 10:45:36 -0700, "Chris F." <zappyman(a)hotmail.com>
wrote:

> 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.
>
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.

PlainBill
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