Built in Guitar Tuner?

Okay well i got a Electric/Acoustic Guitar 2 days ago and its a Ibanez Talmon TCY10 and it has a built in tuner.It came with a battery and i unwrapped it and put it in.so the tuner thing wont light up or anything.is the tuner messed up,do i need to have a Guitar cable or is it possible that i just need a new battery though i havent even turned it on?