Acura 1999 tl radio promblem

Try this: If you have jumped or replaced the battery at anytime this will happen. You have to get the serial number off the radio by removing it or partially taking it out to see the numbers on it try not to remove any cords. With the stereo out (to make sure you get the right number off of it) call an Acura dealership with the number and they will give you the another number to enter into the stereo and directions on how to punch the numbers in. Make sure while you have the stereo out you write the serial number down and keep it in a safe place also the number that the Acura dealership gives you because if you sell the car or if it happens again its easily accessible. Good Luck!