On Mon, 14 Jul 2008 15:51:56 -0700 (PDT), snipped-for-privacy@cox.net put finger
> to keyboard and composed:
>
> >I need your help once again group. This is my first LCD TV to fool
> >with, but I suspect troubleshooting the power supply is the same. The
> >set has no standby power, totally dead. I did some initial checking in
> >the supply, but found nothing wrong. Have good B+ on the switching
> >regulator, but even trying to trace the PCB, I can't figure out where
> >the standby power is derived. I have checked almost every component on
> >the PSB and found nothing bad. So, without a schematic, I was hoping
> >someone here has dealt with this type issue on same model or similiar.
> >It's a friends TV and only 6 months old, but he asked me to look at it
> >details on since it was going to cost him money ($225) to ship for
> >repair. Thanks to all that reply, and yes, if it was my TV, I wouldn't
> >be paying jack, but as I said, I would rather just help him with
> >repairing it. Thanks again group.
>
> I suggest you upload a photo of the PSU/PCB to your web space.
>
> Otherwise, locate a +5V or +3.3V point somewhere in the logic (at the
> main CPU?) and trace it back to your PSU.
>
> When I'm unable to obtain circuit diagrams, I attempt to find the
> datasheets for the various ICs. Sometimes these will contain
> application circuits.
>
> - Franc Zabkar
> --
> Please remove one 'i' from my address when replying by email.
Thanks Franc. So far I have checked every pin connection from the PSU and have no voltage. There is another IC I need to look up to verify it's operation, but I didn't consider this as part of the standby voltage circuit. I will post follow up if status changes.