turning icon at apple boot

[BigBadBen]

hi all
i have succed to upgraded to 10.5.3 without a kernel panic.(cuz i have change for a new sata hd).
but
now at reboot i have the grey screen with apple + the turning icon..
I have let the computer boot. 1 hour after nothing had change (still the grey apple with icon?).
any help?

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