Computer screen laptop black after changing user or shutdown.

I am running Windows Vista Home Premium Service Pack 2 on an Acer Extensa 4420.  I had problems with my laptop screen.  Whenever we try to change user or shut down the computer, the laptop screen does not illuminate.  I tried something I read on the internet, where you remove the battery and unplug the unit and then put the back and reboot and it worked for awhile but is less consistent.

I am currently using the computer with an external monitor connected.  I downloaded the latest driver for my graphics card and that didn't make a difference.

Hello

·         Since when are you facing the issue?

·         Black screen that occurs after that use the button change user, is what happens when the applications for the user you are currently logged as long as.

·         Was it all (hardware or software) changes made to the computer until the problem started to occur?

·         Does it happen on any user where you spend one?

·         Using a VPN connection?

·         What type of internet connection you have?

·         Who is the manufacturer of the graphics card?

You can check if the third-party application is causing the problem. To identify which application can be the question originally, to perform a clean boot on your computer. To configure the boot of the computer follow the link below.

How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

http://support.Microsoft.com/kb/929135

Note: When you are finished troubleshooting, follow step 7 article to start on normal startup.

Hope this information is useful.

Amrita M

Microsoft Answers Support Engineer
Visit our Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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