The Sharp Aquos will respond to the power off command, however, before it will respond to the power on command you need to send the following RS232 command string: RSPW1_ _ _0D
You only need to send that command one time. Now you can turn the power on by sending the following command string: POWR1_ _ _0D
To turn off send: POWR0_ _ _0D
Its important u understand in the above protocol _ means space. So 3 spaces followed by carriage return. I prefer converting to hex and sending the hex codes through Data Viewer. Here's how these codes look in hex and formatted for our control system;
POWR1_ _ _0D = \x50\x4F\x57\x52\x31\x20\x20\x20\x0D
POWR0_ _ _0D = \x50\x4F\x57\x52\x30\x20\x20\x20\x0D
RSPW1_ _ _0D = \x52\x53\x50\x57\x31\x20\x20\x20\x0D
If for some reason you're still having issues after sending the RSPW1 command cycle power to the TV and then try sending the power on/off commands and they should work.
When all else fails I suggest contacting Sharp tech support. Don't waste time searching the internet forums because you'll get so many different solutions you'll be confused to death. Believe it or not, Sharp has very good tech support. Be persistent and don't let the buck stop at the first tier. Take it to the second level where you can get some real help by phone.
Hope this helps.
