CLARION RADIO CODE ????

I bought a used CLARION PU-9469A.S/N 0020092 286-7371-00 product No 97001F it doesn't prompt for a code, and the display panel is illuminate as well as the control panel And accept numbers from 1 to 5
(no sound). Does it just need a code or is it broke?
Anti theft system have been written on the front, also no red flashing LED.

Please help
yasseralgendy@hotmail.com