Will Not Interact/Play Music/Make Sound

Found my old 2007 Amp'd version I put 3 new batteries in it and it will turn on but u cant hardly see the LED lights and it wont play music or bark wine or anything sound at all except a ticking sort of sound. I have tried the nose button and the tail and even held the reset button. It wont turn off by holding the nose button either. The only time it makes a sound is when I switch it to DEMO mode and it will play lik 2-3 seconds of music and will bark but then goes silent again. I have checked where you put the batteries and it immaculate no corrosion or anything. Any ideas?