You've probably sorted this by now, but I normally just reset the CMOS when this happens - saves inserting gfx, booting, ejecting gfx, booting, swearing at it still not working.
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Sent from my mobile, so please forgive spelling/brevity.
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Please post to: Hampshire@???
Web Interface:
https://mailman.lug.org.uk/mailman/listinfo/hampshire
LUG URL:
http://www.hantslug.org.uk
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