you did not say what remote you have. but you can try 11531. If that does not work look on the top of the page there is a search box and the default says "board" do a search for coby, you will see all the other people who have asked for a code for that company and what was found.
I've tried every code i could find. The one that it gives in the manual works but then again not really, the power button changes my tv channel to 7 my volume down button mutes my tv and my Mute button changes my Tv to channel 4. Can someone help me?!