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[gordon94116]

Hi,
i've a compaq presario f730us (vista), which has been going into sleep mode (i assume), when i select hibernate.
what happens is that i usually select hibernate, so that i can resume by powering up.
when i power up, the machine attempts to boot, the dvd/cd drive spins and after a while, shuts down.
i've tried fn+f2,fn+f1,fn+f3.
any ideas?
i thought i woked it up one time with f2, but can't seem to bring it up this time.
thx