Hey i have an 01 accord... the same thing happend to me. Im not familiar with how the 03 radio pops out but if u can pop it out look at the back wires. Look and make sure all your wires are in tact and are connected. If they are all in tact and connected you could be looking at some type of short. Oh and before you pull out your radio and toy with all those wires, disconnect your negative battery terminal to prevent short circuiting. Good Luck :db: