[lubuntu] lubuntu won't boot right up when i start up my pc

view story

http://ubuntuforums.org – i recently installed lubuntu on an old dell d600 that was just sitting. and when the lubuntu installer finished it gave the restart option which i choose and let it do it's work but after it went past the dell loading screen the lcd turned off and did nothing more. so i rebooted and went to the one time boot menu and choose the one time boot menu and after a few seconds the lubuntu 12.04 screen popped up and a few seconds latter the desktop appeared. is there a specific setting i have to change in bios or such in order for it to natively boot? P.S. i also might do this on a powerbook g4 a (Hardware)