Display error when hooking up Powerbook to external monitor

[Bacong]

Hello everyone,

First off, according to mac tracker the Powerbook I have is the Powerbook G4 15 inch FW-800. I am running Mac OS X Leopard 10.5.6

Alright. About one week ago, I hooked up the powerbook to a 19 inch external LCD monitor with a DVI to VGA convertor, and all was well. It found my supported resolution and everything, worked straight away, etc.

Fast forward to today, at about 2pm (4 hours ago) I was using the computer and everything was working fine, but I had left it on for a few days so I shut it off when I was about to take a nap. I wake up from said nap about 20 minutes ago, turn on my Mac and my external display is only showing up at 800x600. I have no idea how this could have happened. This would not be an issue if my monitor's native resolution of 1440x900 were on the massive list of resolutions to chose from, but alas it is not.

So, obviously, my question to you nice folks is this: How may this be alleviated? I've tried rebooting, reconnecting cables and everything.

 

[Bacong]

To add, the display on the Powerbook works just fine. If I remove the monitor, the Powerbook goes back to main display and nothing is wrong.

 

[BlueRevolution]

Hmm, interesting. Does the monitor have a DVI input?

 

[Bacong]

It does not.

Anyway, this works now for whatever reason. I unplugged everything, turned everything off as I had done prior and this time it took. I just hope it doesn't happen again.

In the 6 months that I have owned this Mac, count this down as the first and only actual problem I've had, and it wasn't a problem for long. So I can't complain.

 

[Bacong]

This happened once again, this morning. I was able to fix it but I hope this is not a recurring issue. Again, anyone have any ideas?

 

[Bacong]

Bump once again. This indeed has become a recurring issue. Is there some sort of display drivers that may have gone awry?