I'm hoping somebody can give me some help here. I've tried to eject the disc from the Comand drive in the boot (NTG1 original disc apparently) to replace with a newer version but nothing happens. No nice whirring noises and disc still in drive. The MAP function now doesn't show any maps (which it did before) but the NAV function still seems OK although also doesn't show any route maps, just gives audio directions so I've obviously messed something up. Is there a specific fuse I could check (can't find a fuse map either)? Thanks......