problems with dell inspiron 700 connecting to dell 2300mp projector

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pamelas
problems with dell inspiron 700 connecting to dell 2300mp projector

I have manually "extended" my desktop to the projector, which is connected via vga... everything is connected properly, but I can't toggle using fn f8 and my projector is not seeing my laptop. 

 I had my brother clean up my laptop (format hard drive and reload windows) and I have not been able to use an external monitor since then (worked fine before)

 If anyone has an idea on how to fix this I would certainly appreciate the help :)

 

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