Stereo display is staying on when ignition is off
 

Hi all, i have a problem that just started yesterday. My car stereo display just started staying lit up even when car is shut off. This is a stereo that i installed myself about 6 months ago and is wired correctly and worked just fine up until yesterday. When i shut off the car before yesterday the stereo would also shut off, now when i shut off the car the sound shuts off or if a cd is playing it will quit playing but the display will stay on. No sound will stay on, just the display. I cannot control anything and nothing plays but the 1.8" lcd display just stays lit unless i remove the faceplate otherwise it just stays lit 24/7. I'm just not sure what it could be. Any suggestions?