External monitor not working

Hello all,
I have a PB G3 Series (Wallstreet), running OS 10.2.8. Having trouble running an external monitor. When I start up the computer, I get (on the external display) the Apple logo and the ticking dial for about 15 seconds, but everything after that is displayed on the PB display, and I can't find a way to switch the display in the Preferences.
I'm sure I'm overlooking something obvious, so be kind, please! Any ideas?
Thank you!
Brad

Brad,
When you open up the System Preferences do you see a Displays pane?
I hooked an external monitor to my Wallstreet running 10.3.9. When I opened the Displays preference I had settings for simulcast (mirroring), external and the laptop display in the resolutions window. After unhooking the monitor the only settings that remained where 640x480, 800x600, and 1024x768 resolutions for the laptop.
Hope this is something new and not something you already know.
Shane

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