Question about Sony VAIO VGP-BMS33/B

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Sony Vaio VGN-FW25 function Key is not working

I have a FW 25 laptop and i do downgrade my OS from VISTA to XP
my function Key and HDMI is not working

like fn+f7 for projector , fn+f5 or f6 for brightness

i need urgent help regarding this becouse i use this computer for presntation manly and untill now i cant connect it to projector or HDMI LCD

any body can help

Posted by on

  • mr_vage Jan 31, 2009

    cant find the same model in this website i have try this before but i also cant find it

    i have define all the driver but still my HDMI and Function Key is not Working

    thanks for your help

    any other Suggestion

  • nostalgic_82 Jan 10, 2010

    Could you please tell me how you downgraded fw25? Detailed instructions would be much appreciated.



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Just install the driver for it

Posted on Oct 04, 2009

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If you have downgraded, it means you reformatted your hard drive and installed a new operating system.
Now you must go to Sony's site and download the drivers for the motherboard, as they are not included in Windows.
You should be able to find your model at this link:,24,26,66,9,70,5,72

Good luck

Posted on Jan 30, 2009


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It's probably not supported Sony.

You can try and downgrade but you might lose some functionality. I downgraded my Vista Gateway laptop to XP but had to spend a lot of time tracking down drivers that would work correctly.

You won't be able to just pop in an XP cd and install. You'll have to jump through a few hoops.

Here's the biggest hoop and guide here:

Since you have a newer laptop your hard drive uses sata drivers which the XP cd doesn't have built-in.

Let me know if you get stuck or have anymore questions.

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