Dell Inspiron 1526 blank screen after hib...

My Dell Inspiron 1526 won't restore after hibernation.

After a recent Vista update the laptop was placed in hibernation mode before the normal 'restart to complete update' process. After a minute or so i press a button expecting to see a logon screen, instead the monitor was off, blank screen with no power. I presss every button but nothing happened. After a restart the monitor remains off but i can still hear 1526 checking the cd drive. I restarted several times trying the Fn+F8 option with an external monitor and pressing the up button while holding Fn but still the same.

1526 appear to be in a wierd state because i placed a XP boot cd and restart then hit Enter several times. If the backlight or inverter was the only problem then 1526 would boot from the cd as normal though i wouldn't be able to see. It doesn't, it simply power up, checks the cd drive then does nothing.

The multimedia buttons lights up when i press them and the fan is on.

I don't have the warranty paperworks.

How can i fix it?