How do I reset sharp LC42D65U 42 in. LCD HDTV to factory setting

SOURCE: Sharp 42" flat screen LCD T.V.

You have a bad buffer ic,which is part of the lcd panel.Definiately call sharp to get it repaired.If it doesn't have a warranty,persistence through sharp will get you results.

SOURCE: I have no 'input selection' on my Sharp HDTV 37", model LC37DW99U

On your menu, go to the channel settings. Go to add/delete channel. You will have to add this channel manualy. The tv might have went into autoprogram mode and deleted it.

SOURCE: Sharp LCD 42" picture to dark

No, just go into your setup, and adjust the darkness. Should work for you.

SOURCE: sharp 42 lcd tv , no sound?

Main pcb needs to be replace

SOURCE: I have the Sharp aquos LC-42D62U 42 in. HDTV LCD

Unplug all connnections,replug see solved the prob.Not than u must replaced the main backlight video board.