My navigation well not turn on?

hi, my friend gave me a used tom tom he said he had no problems with it, however when the battery went i tried charging it the green light came on and the hands appeared on the screen, but thats it, it wouldnt go no further ive tried charging it but it wont go to another screen apart from the start up. do you know what might be wrong with it?

thanks

kirsty
June 2011