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14 Posts

01-10-2011

Canada

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Windows switches to external monitor on bootup - can't login

2011-12-10, 13:45 PM

When my T420s boots up normally (I see BIOS stuff on screen) but once windows has started it switches to an external monitor - so I can't see anything, can't login, etc. I have to plugin an external monitor to login and switch back to the LCD using Fn-F7. 

 

How can I force Windows to use the LCD by default?  I can't be around an external monitor every time I boot my laptop...

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315 Posts

02-21-2008

Singapore

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Re: Windows switches to external monitor on bootup - can't login

2011-12-10, 14:01 PM

press F1 when bootup, go into Bios and set the startup display to Thinkpad instead of VGA or digital

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14 Posts

01-10-2011

Canada

35 Signins

101 Page Views

  • Posts: 14
  • Registered: ‎01-10-2011
  • Location: Canada
  • Views: 101
  • Message 3 of 4

Re: Windows switches to external monitor on bootup - can't login

2011-12-21, 13:42 PM

No that's not it.  The BIOS is correctly set to LCD as default, and Optimus for OS.

 

Note that the system correctly starts on the internal monitor, all the way to "starting windows" animated screen, but then Windows 7 switches to the external monitor.  I have to manually switch it back to internal using Fn-f7 (or actually plugging in an external monitor).

 

It seems that some detection in Windows thinks the external monitor is in use, or is the default, etc.  That's what needs fixing.  Help!

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1 Posts

02-01-2012

Massachusetts

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Re: Windows switches to external monitor on bootup - can't login

2012-02-01, 19:44 PM

Did you ever find the answer to this? I am having the same problem.

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