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wrote:

This is the typical problem that I see with these tv's posted all over
the internet, hit the power button, light is green for a few seconds,
and then turns off. I haven't found any good suggestions as to the
cause or possible fix for it, outside of sending it to a tech. That is
fine, as my last option, but I come to these sites for suggestions as
to what "I" can do to fix the problem with as little money going out as
possible. The tv is a VS-50603 and is about 5 years old, so the other
thing I see is, "buy a new tv". I have no problems with this tv, when
working, and it is the one I have in my bedroom, so I don't care to
spend a lot to replace a tv in my bedroom, I have a much newer one in
the living room and it cost more than enough. Also, this may just be
me, but I would like to get more than 5 years out of something this
expensive. It still looks brand new and is just a couple years out of
warranty, so I don't want to scrap it. My parents had their tv for
about twenty-five years, so I'd hate to think that quality of products
is getting that much worse, even though I know that it is. It started
smoking a while back when I turned it off and I had a tech come pick it
up for $80 and they charged me $370 to replace a board that blew out.
So, a few months later, this happens. I don't believe the two are
related and don't believe that he did anything wrong, it worked fine
for 3 months. Any suggestions would be greatly appreciated. Thank you
in advance.

To get the advice you're looking for you need to do some basic
troubleshooting, and let us know things like standby voltages, signals
etc. Then you can troubleshoot the set.
Example: Set is completely dead - check AC power from the power cord
and follow it to the power supply board and find out where the
voltage/power are NOT geting to.
Note: if you find a blown fuse, that's more like a symptom than a
problem. Chances are one or more shorted components caused it to blow.
If you replace it without checking what caused it to blow you may cause
further damage to the poer supply circuits.
If you replace it with an incorrect (higher) value, you will burn out
more components, maybe make the set not worth repairing, and maybe even
cause a fire!
With modern Projection Tvs, there is a switching power supply, and it's
not likely to be only one component causing the problem. More likely
several capacitors have each gone slightly out of their original value
and caused multiple transistors, diodes, and ICs to fail.
This means if you don't troubleshoot and test enough components, you
could end up finding ten bad components, replacing them, and then an
11th bad part causes the ten replacements to fail again.

None of this is meant to discourage you. Do some basic troubleshooting
and post your initial results here.