Mac mini turns on, but does nothing
I have a 2023 Mini with M2 Pro that will turn on, then nothing beyond that. I first noticed it yesterday (8/16) when I tried to turn it on to pay some bills. I first thought it might be the HDMI cord to the monitor, but after trying a different cord - nothing. I've tried to restart and press Command-R, still nothing.
All I can see it doing is powering on (white light in back + Mac startup sound), then the white light goes off and on, then it changes to a yellow/orange light and starts blinking like it is sending me some message in morse code. 4 fast blinks, 3 slow blinks, 2 fast blinks over and over. No idea what that is. Power supply is fine, I can plug other things in the same place and they work OK.
I have an appointment to get it checked out this coming weekend, but wondered if anyone has any ideas what's going on.
*Edited to add that the reason I am waiting nearly a week to get an appointment is that most of the area around the local Apple Store/Genius Bar is submerged (Google Indianapolis flooding) and I am not sure how hard it is to get there.