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Message: [QUOTE="Dave Logan, post: 14165829"] Two more things I should have mentioned: 1) In the Desktop/Properties/Settings tab, if I select "2. Default monitor", the "use this device as my primary monitor" checkbox is greyed out. 2) In the above tab, if I select "2. Default monitor" and then select "Extend my Windows desktop onto this monitor", then the desktop *is* extended and displayed on my external monitor (although my applications are not displayed on it). This proves that there is no problem with my Video port - the laptop is still capable of displaying on the external monitor when it wants to, but it's just being awkward! Any ideas? Dave | Hi | | I have a Sony Vaio laptop running XP, and recently the external monitor | feature has stopped working. If I press Fn+F7, the computer beeps but the | "choose between internal and external monitors" menu isn't displayed any | more. If I right-click the Desktop and select Properties, and then choose | the Settings tab, under Display it lists "1. Sony notebook LCD, 2. Default | monitor" - but in the image above that list, "2" is greyed out, and if I | select "2. Default monitor" from the list and click OK, the laptop doesn't | switch to external display as I'd expect it to. | | Is there any way of getting to the bottom of why I can't use an external | monitor any more, and of fixing the problem? | | Dave | | [/QUOTE]