external firewire boot option causes lockout

WHEN BOOTING EXTERNAL DVD I get the ? box. when I press the option key I get a blue screen with a locked padlock a text box in the middle and an arrow pointing right in a box on the right side. Like a password lock? I got the PBg4 at an auction and I need to reload the OS. Any Help? thanks

Mike

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More info is needed on exactly what type of message you are seeing.

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I am getting what I believe is a firmware password lockout. It is a solid blue window, as in the installation window, but instead of the apple or the box with mac or ? , this window has 3 items. left side: a locked padlock, center a white textbox, for a password?, and right side is a square box with an arrow pointing right. but when I click on the arrow nothing happens. If I push any keys The text box in the center fills up with dots. weird huh? help

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Change the RAM configuration (any change) boot and reset the PRAM immediately (command - option -P & R keys. You only get one free reboot per RAM change. Now boot from a system installation disk and reformat the drive and install a system.

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Mike Harris will be eternally grateful.
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