The Live Front Panel Feed section displays the live feed of the messages currently being displayed on the LCD front panel. When the system is operating normally (indicated by Solid Blue color in the LCD front panel), then both Hide Error and UnHide Error is grayed-out. You can hide or unhide the errors only for rack and tower servers.
To view LCD front panel status using RACADM, use the objects in the System.LCD group. For more information, see the iDRAC8 RACADM Command Line Interface Reference Guide available at dell.com/idracmanuals.