try re-instalin d Grafix card drivers
and if got n e drivers 4 monitor den re-install dat also
if u dont have 3p drivers 4 monitor den u may wan 2 reinstall d win-supplied drivers thru device manager
try re-instalin d Grafix card drivers
and if got n e drivers 4 monitor den re-install dat also
if u dont have 3p drivers 4 monitor den u may wan 2 reinstall d win-supplied drivers thru device manager