Help with Electronic lock Project

[Chelsea Blunk]

So, a while back, I found this empty, older safe with an electronic lock on it.  The batteries were dead, so I had to get in through the key entry (obviously). 

 

After I was in, I changed out the batteries and…. (this is where I'm stuck)

 

With power, it continuously beeps, and the LED screen looks like it's searching, then reads "ALLrEADY" and then just flashes "Clear" 

 

Now, it doesn't have anything that shows what company made it and the only two possible identifiers I have been searching for for a month, and can't find anything that helps. I just want to get it working and all set up. I can send pictures if it helps, but the board reads:

 

AOK-LK-LCDM Rev A

050103

 

the microcontroller reads:

 

E LAN

EM78P447 SAP

0328F  BC37B7

 

 

Are you familiar with this? Can you help?

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