Probable failure of the main power supply.
There is a small separate supply that is always on so the set can respond to remote signals and typically, the power indicator is supplied with this one meaning that it will generally stay on even if the set can't turn on.
SOURCE: ViewSonic N4251w 42 in. LCD Television
pulled main board and reseat conector in the board right in the middle of the set. set is runing for two hours, keep you posted.
SOURCE: Heard a loud pop and picture went out. Still have sound
Ur tv have burns capacitors,look for pop ups caps.
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