93 Camry radio stuck in "HELP" mode

I have a 1993 toyota camry that I recently changed the battery on and afterwards the antitheft radio would not work. I recently bought this car and did not know
where to find the original owners code to unlock the radio until AFTER I locked the radio up, meaning that it's now stuck with a "HELP" message across the screen. I do have the code now, I just don;t know how to get it out of this help screen. Any help would be appreciated.
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On 2016-09-26 4:18 PM, Radio locked wrote:

Google or any of the other search engines--what, exactly, do you think their purpose is?
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