what does this screen mean?

[hyprspec]

I dont have a screen shot of it, but It's pretty easy to describe. I was attempting to flash my phone this weekend. I did not get it every time, but the power + home buttons being held would yield a black screen with a pic of a phone sitting under a triangle with exclamation point inside of it. What does this screen mean.

Additionally-
The other screen that I was able to get was not the screen with "wipe" and apply update screen that it seems all the "how to's" say I should get. I was only able to get a reset screen.

I'm guessing my hero does not have the proper custom recovery image to allow flashing?

Thank you for your time