Audio Systems: PEO Code 2000 Honda Accord, radio code, honda accord

Question
We left the interior lights on all night and the battery was dead the next morning.  Now the radio has PEO on the display.
What's going on?

Answer
I have done some looking and it seems that PEO is the Hondas version of disk could not be read. But usually when a radio display something after the battery has been dead it needs a radio code to unlock it.  I would first call Honda at the 1-800 number they have listed.  You could use the directory 1-800-555-1212. Free 1800 directory assistance.
They can give you the code if you give them all of your information. But I would make sure there isn't a disk stuck in it first.
Anton,