F2-223 makes a looping beep when starting up

[macos]

my terramaster F2-223 makes a looping beep when starting up.

nothing appears on the screen.

I removed the backup battery.

I removed all the discs.

I pressed the reset button.

but it's a beep loop and nothing else.

[TMzethar]

From your description, it seems that this may be a memory module anomaly. Please refer to this to troubleshoot the problem:
viewtopic.php?f=82&t=3890