I have an answer to all who owns a Sharp TV Aquos with the Multi input Box. First try this--- Turn off the TV itself, leave the Input box on, then unplug the display cables, power cables, then hold down the -vol button and the input button on the tv itself. Then turn on the power button, plug in the power Cable while holding down the -vol and the input button.
Then after about 2 seconds after power comes on, let go of the buttons and wait until the back light screen comes on, it could take from instant to an hour. When it comes on this means it will be in service mode. Then plug in the display cables, let it sit for several minutes. After that turn off the TV and turn it back on. Do this again if it doesn't work the first time. There ia ways to fix this problem, you can enter the computer of the TV it has, through a USB to a Cat5 cable, that goes from your computer to Roughter, and Cat5 to Serial cable that goes from roughter to TV, enter into your computer the command line to disable standby. Or you can do a firmware update.
Dreamingwolf, October 2010