For anyone looking for the external IEC fuse replacement. Disconnect powercord.
You have to take a small blade screwdriver and insert into the IEC black plastic receptacle and push down on the tab or tongue like part of the piece. When it comes loose you then have to pull down with your other hand and pry out of the holder.
Pretty slick

Once it is out you can see that the fuse is held in with the spare tucked into its own little holster.
Well, after finding that it was blown as well I checked the internal ones again to make sure they were OK and put the unit back into my rack. Put on the PC,IC's and powered back up. No power, no Blue light, no soft start. Checked with a different PC and no luck. There was no powersurge or problems with any other components.

Checked the manual and I'm out of options so left call to Klaus