Hi
you could try this it sometimes work
turn off laptop and unplug power cord
turn laptop upside down
find the panel underneath that holds the hard drive usually 2 screws
remove panel and remove the hard drive
If you are not sure how to remove the hard drive ( not difficult )
http://bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01884372&printver=true
turn laptop up correct way and try to restart laptop
it wont start up because you have removed the hard drive
now switch off again
turn upside down again
replace the hard drive
replace the panel
turn up correct way
and try to restart the laptop again
if this dont work
now turn off and on again pressing the F8 tab a few times to see if it takes you into repair options
and try the back to last known good configurations
or try some of the other repair options
hope you get it sorted
many thanks
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