Can't get sound on my 60" Sharp Aquos TV. Picture is great, but no sound using TV control or cable box control

SOURCE: sound

You may want to check to make sure that the tv output select (Menu > Options > Output Select > enter ) is set to fixed and not variable. Also. bypass the HD box and run the coaxial straight into the tv from the wall. If you have sound chances are you need to reset your cable box.

SOURCE: Sharp Aquos LC-65D64U Picture Quality

You need to change your TV's settings and enhancements. Directly from the store and out of the box, the settings are adjusted for easiest sell in the store. That means that:
Your contrast is cranked to 100. Move this down to 50 to 60.
Your brightness may also be cranked up high. Lower it to a level nearer the middle range but not so dark as to lose detail in the shadows.
Your TV is set on "Dynamic" or "Vivid" mode. Pick "natural" or "normal" or standard.
Your sharpness is at least on, if not cranked up. Turn sharpness down or off, and the same with "Edge Enhancement" and "VSM", all to off.

Lastly, I bet you upgraded size and you are now sitting too close to the TV. Roughly, if you are sitting closer than 130 inches (about 11 foot) you might do some rearranging or save some money and get a smaller TV.

SOURCE: Programming the Acquos Remote

I got a a sharp LC-32D43U and for my motorola cable box i use hte code 31 from jerrold, i take it from the manual and i got it tryin every single code unti i get one that works.

Hope it works for you

SOURCE: Programming the Acquos Remote

Input code 0093 into your Comcast remote. Here's a link for the how to: http://www.comcast.com/MediaLibrary/1/2/CM/VanityURL/documents/comcast_dvr_remote_manual.pdf

SOURCE: My Sharp Aquos TV has stopped responding to remote control(s)

Unplugging my TV for 15 seconds (longer actually - at least a minute) made the remote and the satellite TV remote both work again with the TV.  Thanks for the tip!