My sharp aquos LC-62C42U is part of a home theater system. Everything was fine this morning. I turned the system off and when I turned it back on several hours later, I have no audio. I checked my receiver by setting it to tuner mode and I instantly have audio, so my presumption is that the receiver is fine.

SOURCE: LC-37D62U Sharp Aquos HDTV Settings

lost sound on Sharp Aquos 37LCD62U

SOURCE: Sharp Aquos LC 37D6U

Please be aware that this a big problem on this unit. The insulator material used by sharp to between the IC's on the AV board both on top of the boards and underneath the the AV pcb is failing. This insulator is mounted to the IC and under the metal heat sinc. Remove the back and pull the AV Board out of the unit. Use zylene or alcohol and clean all of the grey insulator from between the pins on the ic and order the replacement insulators from Sharp. Most times this will correct the no sound problem. Sometimes this has also damaged the AV pcb and it will have to be replaced. The parts that should be replaced come in a kit with sharp part # PSPKIT663WHZZ. If the kit is not available the 2 parts needed are PSPAZA663WJKZ AND PRDARA216WJFW.

SOURCE: sharp aquos lc-52se94u green screen

If it it new, take it back. The product is not working properly.

SOURCE: Audio Problems with Sharp Aquos T. V.

Just talked to a fellow at Audiotronics regarding Sharp Aquos.
This is a widespread problem with audio on their TV's, The tech. said there may be a full recall regarding this problem!!!

SOURCE: sharp aquos no sound through hdmi

Reset all audio factory setting.Tries unplug,replug it well work,if ur backlight video board it still good.

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