Hi Luke,
Man, this is a strange one. I had never heard of such a thing. Now, I just looked and it seems there's quite some threads about similar issues on the Apple Support forum (try a search with "bsd login" for example).
One guy seems to have a working solution. The culprit would be a corrupted NetInfo database, and you should find a way to repair it.
In your case, the situation is made a lot worse due to your broken internal monitor…
Basically, you'll have to choose between trying to fix the issue, or trying to avoid it by reinstalling your whole system (I saw on your youtube comments that some guy already told you that, but you just can't reboot on the cd and see what's happening…). Your choice will depend on the data you have on the PowerBook; how important is it? I would advise, if you can, first backing up your stuff to another Mac by booting the PowerBook in Target mode, and then try and reinstall from scratch.
And by the way, what model of PowerBook is it? And what version of Mac OS X? Not that it should change a lot, but you'll never know…
Frankly, your system seems so messed up, that I wouldn't bother to fix it, and just reinstall it.
First you'll want to boot on the CD and still see what's going on on screen. Reset the PRAM and NVRAM, it will eventually make your computer forget about its internal monitor at startup time and immediately sync to the external one. To do this, hold Command - Option (alt) - P - R at startup. Hold until you've heard several "boiing". Official docs about resetting the PRAM: http://support.apple.com/kb/HT1379?viewlocale=en_US.
Now try again to boot from the CD (hold the C key at startup). There's no way booting from a CD would disable the external video signal… so if you still can't see anything on the external monitor, there's more likely another hardware issue going on…
hth!
Man, this is a strange one. I had never heard of such a thing. Now, I just looked and it seems there's quite some threads about similar issues on the Apple Support forum (try a search with "bsd login" for example).
One guy seems to have a working solution. The culprit would be a corrupted NetInfo database, and you should find a way to repair it.
In your case, the situation is made a lot worse due to your broken internal monitor…
Basically, you'll have to choose between trying to fix the issue, or trying to avoid it by reinstalling your whole system (I saw on your youtube comments that some guy already told you that, but you just can't reboot on the cd and see what's happening…). Your choice will depend on the data you have on the PowerBook; how important is it? I would advise, if you can, first backing up your stuff to another Mac by booting the PowerBook in Target mode, and then try and reinstall from scratch.
And by the way, what model of PowerBook is it? And what version of Mac OS X? Not that it should change a lot, but you'll never know…
Frankly, your system seems so messed up, that I wouldn't bother to fix it, and just reinstall it.
First you'll want to boot on the CD and still see what's going on on screen. Reset the PRAM and NVRAM, it will eventually make your computer forget about its internal monitor at startup time and immediately sync to the external one. To do this, hold Command - Option (alt) - P - R at startup. Hold until you've heard several "boiing". Official docs about resetting the PRAM: http://support.apple.com/kb/HT1379?viewlocale=en_US.
Now try again to boot from the CD (hold the C key at startup). There's no way booting from a CD would disable the external video signal… so if you still can't see anything on the external monitor, there's more likely another hardware issue going on…
hth!