As far as I can tell, Sony doesn't have any codes for Orion TVs. You can try searching through all of the codes in the remote. Turn on the TV, press and hold the Set button and then press the Power button. Release the buttons. Then press TV button (component button). Press the CH+ button followed by the Power button. Repeat the CH+ and Power combination until the TV responds (powers off, changes channel). Then press ENT. Check if the TV responds to the remote on other functions. If it doesn't repeat the steps from press and hold the Set button.
This can take up to 70 tries.
Alternatively, try a replacement remote for the TV or a USB programmable universal remote. http://www.remotes.com/store/orion/tv1934.html
is a substitute remote that should handle all of the functions.
I hope this helps.