Test the power supply voltages and see if some are missing or incorect, if they are replace the power board
SOURCE: Power is there, but TV won't turn on
stored voltages are high no touching these circuts becuase they hold charges and alot of screws.
fualty capacitors you say after a while it stays on theres a full charge in the unit theres some type of discharging effect on the set after its off for a while. voltage goes to low or unstable after it is off for a while. your better off getting the service docs for this set if you want to diy..other wise get a tv tech to check it for you. hope this helps
SOURCE: Model VS42LFHDTV10A. The TV is
This may be the problem of relay switches. It can be replaced to eliminate such errors.
SOURCE: Vizio m550nv led lcd tv. Problem began a couple
I had same problem. Unplug set for 10minutes then plug it in and let it go thru it's startup routine.
SOURCE: Upon powering on my xvt47sv
The main board of this Vizio is known to fail after some use.
Its number is CBPF9D1KZ4 and as you will see it is hard to find, unless you want to pay $250 or so, which doesn't make any sense, at least to me.
Another common failure in those is the T-CON board, but from the sound of it the problem you have is in the main board.
Here's what I'd do if I were you: post a local ad on Craigslist, sell it to the highest bidder and use the money towards puchasing a new TV.
Not sure it's what you want to hear, but it's what I tell some customers and thus losing business that I couldn't have had anyway because it's insanely expensive and prone to more failures anyway.
If it helps you please vote for me - it helps me in turn :-)
www.coppelltvrepair.com
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