To address the issue; a first troubleshooting step may be to test removing power for a few minutes (not only a power off but remove all power cables). After a few minutes test to confirm if powering on the appliance shows that this alert has now cleared.
If this does not resolve the issue, it may need required to follow correct grounding procedures, remove power from the appliance, and ensure that the memory is correctly seated. This would be especially relevant if the appliance has been recently moved or unpacked.
Test a subsequent power on of the appliance, monitoring the boot process for any warnings or errors.