Sony Vaio not going into sleep mode

Some how, my Sony Vaio SZ650 n/c has lost the video or monitor driver. I still have high resolution, but I am unable to go into "Sleep" mode when I close my lid. It says on 100% of the time and is draining my battery. Any ideas?
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WERAracerAsked:
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nobusCommented:
are you sure the lid switch still works? test it first
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mathollandCommented:
is the setting right?  

if it is xp, right click on the desktop, go to properties, go to screen saver, then go to power, then advanced tab.  Make sure that it is checked.  

For the driver, go to windows update.  Go to custom, then diselect all the critical updates, and go to hardware, and if it shows up the video driver to update, check it and update it.

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ibexsystemsCommented:
Are you running Vista i know there are a few problems with sleep mode in vista.

Check over your Power Options and make sure you have got all the latest windows updates.

Start ---> Control Panel ------->Power Options
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WERAracerAuthor Commented:
Under the screen saver > power >advanced area, under "When I close the lid of my portable computer", my only option is "DO NOTHING."  
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nobusCommented:
here a troubleshooting guide; it may help.   http://www.vistax64.com/tutorials/63567-power-options-sleep-mode-problems.html

if the problem is recent, a system restore to an earlier date should help you out !
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WERAracerAuthor Commented:
its actually xp
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nobusCommented:
that would not change for the troubleshooting..
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WERAracerAuthor Commented:
Well I tried system restore and it didn't work. Looks like I lost hibernation suport. I tried running the command at the command prompt to invoke hibernation, but it errored out stating my laptop does not support hibernation
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ibexsystemsCommented:
when researching into this i have come across a microsoft artical http://support.microsoft.com/kb/330909 that states that there is a known Hibernation problem on computers with 1 GB of RAM..

how much ram is in your laptop? and are you running service pack 2?
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WERAracerAuthor Commented:
good catch. I will try that
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WERAracerAuthor Commented:
Upgraded to SP3, still does not work. No hibernation support
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