Ran yum upgrade, now cannot boot
Just last night (12/2) I did my weekly yum upgrade and installed all the updates available. I let it run during the night. This morning I noted that yum terminated normally with everything apparently OK. Since these updates included a new version of the kernel (1644), I rebooted the system to run the new kernel. However, it will not boot. The grub menu never even comes up. The CMOS screen simply displays the word GRUB and then hangs.
Any ideas? Anyone else have this problem with the latest updates to FC4?