Flicker Monitor After Update Fedora 10 on Motherboard Asus P5RD1-VM

After install Fedora 10 in MB Asus P5RD1-VM, I do Full Update Fedora.
Which surprise me that my LG monitor is Flicker.
I do not yet known why this matter happened. Anticipation whereas this matter happened because Kernel it also updating too, which not support my VGA Card.
For temporarily when you install Fedora 10 didn't do full Update. But tried the update security Only.