So the few most recent BIOS updates (2802 and the prior two) to my Z690-F have caused the system to give a POST beep, but a second or so after, beep three times. Then the white LED stays lit on on the board.
Visibly, everything works fine. I can get into Windows.
The settings are set correctly (and identical to the previous BIOS revisions), the RAM is on the compatibility list, and none of the hardware is failing or does this in other systems. The only other oddity is that the M.2 drive will not show up about 1 out of every 20 boots until I power cycle the system.
Why has the BIOS started to do this after the most recent updates?