The computer does not boot up

Hi there,
When we start the computer, power is on, however the screen remains "white/light blue". Sometimes the arrow shows up. We have tried all that is suggested in the manual but nothing seems to work. What do you suggest?
Thank you,
4Hawks (on my brother's computer)

Hopefully you have a mac store near. Make a genius bar appointment and take it in. So long as oyu have not damaged the laptop through say dropping it from a tall building or spilling your cosmo all over it I would say you can get this looked at with a good chance of repair.
Boot from the install DVD to rule out hardware is my first suggestion.

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The computer does not boot up

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