Display blanks and does not go to sleep

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Guest

I have a HP dv6000 new laptop with Vista Home Premium preinstalled on it. A
few weeks ago i tried to put my laptop to sleep and the screen would go
black, but thats as far as it got. The laptop stayed on, but the screen was
black. I went to performance issues and i saw that my nvidia geforce 7400
driver was delaying my laptop from going to sleep. Windows told me that this
lasted for only 3 seconds, but after many attempts and having to wait for
more than five minutes, i was still unable to put it to sleep.
I rolled back to the previous version of my video driver and still nothing.
I updated again to the new drivers from the HP Update utility and i still
can't put the laptop to sleep.
Hibernate though works fine. Another issue that i am seeing in the control
panel is that a program that i had to auto shutdown my laptop had prevented
it from going to sleep, but this had been uninstalled long before. Is there a
chence that there have been leftovers from this program that are preventing
my laptop now from going to sleep? Because as long as i had this program
installed there was no problem for both auto and manual sleep options. But i
am not sure if the problem started when i uninstalled the program, or a few
days later.
If the problem is being caused from the video driver what can i do about it,
since installing the new and old drivers does not resolve it?
Any help would be very appreciated.
 
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