On Sun, 29 Jun 2008 11:29:51 -0700 (PDT), Dave put
finger to keyboard and composed:

In the process of trying to determin if my power supply is defective,
or the video board on an LCD TV. I checked the voltage output pins and
found the 5 volts stand by voltage was working fine, but nevertheless
the set does not turn on.

Some one suggested I put my oscilloscope probe on the switched outputs
while pushing the power button to see if the other outputs attempt to
come on before going in to shut down.

Is this a valid test? Can I really expect to see the other output pins
briefly come up if something on the video board is causing my power
supply to go in shut down?

Testing the switched outputs revealed there was not even a spike, so
my hunch is I have a bad power supply.

If a microprocessor has detected a fault that has caused it to shut
down the supply, then you may have to cycle power to the unit in order
for the uP to forget and try again.

- Franc Zabkar
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