I have updated my Red Hat 8 system yesterday using this command

yum update -y

these are messages reported after update

krb5-devel-1.18.2-28.el8_10.x86_64

libkadm5-1.18.2-28.el8_10.x86_64

policycoreutils-devel-2.9-26.el8_10.x86_64

Failed:

pcp-manager-4.3.0-3.el8.x86_64

pcp-webapi-4.3.0-3.el8.x86_64

Error: Transaction failed

After update, a problem occurred: Power-off and Restart buttons failed to work. I then booted the system using this command

reboot -f

The system seems up running as the power switch is lighted, however the monitor is blank (Black screen). I have checked that all cables are connected fine to the monitor. The screen tells there is no signal. Also tried Alt + F2, there is no use.

I appreciate your advise.

Regards

Frank