Sharp flat tv all that is on the screen is 2 gears and a bottom line of three dots moving back and forth for over 1 hour / prior to this was no sound

SOURCE: Blue dots

You have a bad blue LCD in the light engine. Replacement of the light engine is the only fix and it usually will continue to get worse over time

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: Sharp aquos has green and white vertical lines

You must contact a svc co. This is a upper or lower buffer board problem and possibly a control board. Nothing you have done wrong, it just happened.

SOURCE: Blue dots on screen plus ghosting on screen

The optical block is defective. Contact Sony support. Sometimes they will warranty these even after the 1yr warranty has expired. Have your model and serial numbers handy.

SOURCE: White dots and black on my screen

Are these dots moving with image or stationary under a moving image. This is a key identifier