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This indicates the embedded CPU didn't start as expected.
It can be an indication that it’s either dead or couldn’t boot because of a USB disk or stick plugged in the USB ports on the back that has a boot bit enabled but no OS to boot on.
Refer to this page for further help.
If the CPU runs properly but the RoonCore program doesn’t run then the logo turns into a steady red play logo.
This indicates that the Roon Core or Roon Server either crashed or didn’t start properly.
It can briefly turn to this logo for a few seconds when Roon Core is updating for example.
Refer to this page for further help.