Laptop screen goes totally blank-dark after logging in

lianne143
lianne143 used Ask the Experts™
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Hi
I have a sony vaio laptop installed with OEM windows7 and now i have downgraded to XP.When i switch on it goes through the booting process and  gets to the  login screen, after i login the screen goes completely dark no display at all on the screen.But i can see the HD activity lights on. I booted the laptop on the safe mode it dosent go in to a blank screen after i login.I dont know if it is related to a driver or something else.How do i trouble shoot it.
Thanks
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go back into safe mode and change the screen resolution to 1024x768 and see if it fixes on reboot.
Check device manager. Check the Monitors section and make sure you don't have multiple monitors. Delete them all and let windows re-detect after rebooting.
Uninstall then reinstall the video driver.

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Ivano ViolaSystem Administrator
Commented:
Restart your computer and start pressing the F8 key on your keyboard. When the Windows Advanced Options menu appears select Enable VGA Mode: This option starts Windows in 640 x 480 mode by using the current video driver. This mode is useful if the display is configured for a setting that the monitor cannot display.
I  enabled the VGA mode  and changhed the screen resolution to 1024x768  and rebooted and again after logging in i noticed that the laptop dosent maintain the brightness leve it goes tio the minimum level again if i increase the brightness  the screen seems to be ok  and if  i reboot again this happens again .The brightness goes to the minimum level. I reinstalled the video  drivers as well
When i  uninstall the display driver and reboot the laptop it looks fine.Is it the driver causing the problem
Ivano ViolaSystem Administrator
Commented:
Try looking for an updated driver compatible with XP. When you uninstall the existing drive then go to Windows Update, does it provide you with a video card driver?
Firmin FrederickSenior IT Consultant
Commented:
sounds silly but the screen diming, is this both on battery and on mains power? Sounds like you have a power saving feature either presentation, power saver, or the like that keeps adjusting the settings once you've logged in.  This holds true for when you uninstall the driver as the standard vga driver does not comply with advanced power management drivers...for example and therefore your brightness wasn't dimmed when you logged in.

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