If google and manufacturer website are of no help then ask a search agency like http://manualfox.com/link/goodmans.htm - They can get you every Goodmans manual.
And turning it on is where God has played his little trick on man all over again. It might look beautiful, it might be rapturous, it might be the most captivating thing you have ever seen when in full, ravenous bloom, but finding the ON button is all but impossible.
After all, like God's most beautiful creature - woman - the elusive nub is awkwardly placed out of sight, three inches in and one inch up.
You'll never find it.