external monitor on dell m1730 not recognized

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FPCH Owner
Joined
Nov 19, 2003
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11,228
Location
Florida U.S.A.
After win 7 update, windows does not recognize external monitor on my Dell m1730 laptop. I tried restores and the problem persists. I tested the monitor on a XP desktop with a VGA hookup and it worked fine. What causes this?

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