Haweasubaru

Hi, nice info, i have just just bought a 02 H6 and the Nav system doesn't turn on. I am happy to leave it in I'm just wondering if you knew why this would be. I have no fuses blown and the radio works fine. I was wondering if there is a fuse that may have blown behind the dash or in the actual unit. Any info to help with this issue would be great. Cheers