SOURCE: VIZIO TV HISSING SOUND VX42L
Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.
SOURCE: vizio vx42L no power will not come on just went
First place to check will be the power supply, look for blown fuse, burnt parts, bad caps with bulging tops. Check for DC voltages, you should have 5, 12, and 24vdc at the power supply DC output connectors.
Parts: check www.shopjimmy.com
SOURCE: Vizio VX42L LCD TV died?
it is the power supply. in the given scenario like yours, the PSU is the suspect in 90% of the cases.
Testimonial: "alteans is very helpful."
SOURCE: My Vizio VX42L is flashing like a strobe light.
Capitor C241 On power supply was the problem with my tv. Its under the heat sink.
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