TURNING ON MY COMPUTER

I HOPE SOME BODY CAN HELP ME WITH THIS PROBLEM.
WHEN I TURN ON MY COMP A SMALL SQUARE APPEARS IN SIDE THE SQUARE IS A BLUE GLOBE LIKE CIRCLE. THIS CONTINUES FOR ABOUT 10 MINUTES THEN IT DISAPEARS AND IS REPLACED BY A SMALL SQUARE WITH A MANS PROFILE ON IT AND THEN A ? MARK FLASHING ON AND OFF.
I AM BRAND NEW TO COMPS AND DONT KNOW WHAT TO DO.
IT WAS WORKING FINE UNTIL MY BROTHER MESSED AROUND WITH IT.
PLEASE HELP ME.
DOOBEE1929

Firstly, welcome to the Forum!
Most people feel that using UPPERCASE like this is deemed to be shouting.
Now, the small square with the '?' on it is the Mac telling you that it's unable to find a bootable volume. Whatever your brother did has messed things a bit. Boot up from your Panther install disk (restart the Mac with the disk already inside and hold the 'C' key). Choose Disk Utility from the menu and click on repair disk. Restart normally (no 'C') and report back the result.

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Lupunus

TURNING ON MY COMPUTER

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