Black Screen after windows updates

[Dwayne Austin]

Ok I have a Toshiba Satellite L745,  I have reformatted the hard drive, it's a clean install Windows 7 ,  all is good until I update windows and it configures then the screen goes black.  oddly enough you can use an external display monitor and it works fine but the display on the laptop is black.  Tried uninstalling the driver and reinstalling the driver from toshiba website but the same thing happens.  Any one have any Ideas?

[Dwayne Austin]

update ... I now have installed all updates for windows 7 and service pack 1.. when I boot up now most of the time it works fine but every so often there is a strip of horizontal colored line down the right hand side of the screen.  Also sometimes right after the windows logo it will go black and reboot..when it boots up again it works.  Sometimes also I can power off and power back on and it takes me to the logon screen.  ??

[patio]

Does it do the same on an external monitor ? ?

[jason2074]

Does it happen in safemode also on the laptop screen?

[Dwayne Austin]

I does not do the same on external monitor and it does the same in safe mode on the laptop.

[jason2074]

That's odd as the same thing happens in safemode but not by the external monitor. Maybe reseat the ribbon cable for the LCD screen? I am not sure that its a possible inverter problem or GPU chipset basing on your post but not impossible. Does your laptop is built-in with any hardware diagnostic for RAM and Video testing maybe? 

[albertstien3329]

hi
i have same problem
but i resolved it by reinstalling my indows