Win7 does not detect external monitor

I have just upgraded to Win7 Home Premium 32 on a Sony Vaio laptop. Previously I was running Vista Business. I was happily using an LG1512s monitor plugged through the Vaio docking station.

Post the Win7 install, my laptop does not recognise the external monitor. 

I have gone on to the Control Panel\All Control Panel Items\Display\Screen Resolution and the multiple screen dialogue does not appear.


I have with NO success:

  • ·         Clicked “detect” in the Control Panel\All Control Panel Items\Display\Screen Resolution
  • ·         Clicked the F7 monitor on/off button.
  • ·         plugged the monitor directly into the Vaio (i.e. not through the docking station)
  • ·         Used Windows-X and tried to use the mobility centre to connect the external monitor.

Meanwhile I have plugged the monitor into another laptop I use that is running Vista Home and the monitor lights up so I know the monitor and the cables are ok.

The problem is that Win7 is not seeing the external monitor.

Any ideas?



Question Info

Last updated September 11, 2018 Views 38,144 Applies to:
Hello PC_Clot,

Thank you for visiting the Microsoft Answers Community.

You can visit Sony's website and search for all your updated drivers for your model here.

Hope this helps
Microsoft Answers Support Engineer
Visit our Microsoft Answers Feedback Forum and let us know what you think.

Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.