FHDB won't even boot at all, PS2 just goes to black screen

I've been trying and retrying the tutorials for FHDB over and over again to no avail. I can't get the PS2 to actually boot to the FHDB menu. Instead, if I turn on the PS2 with my hard drive inside it, I hear it spin up and then shut down, leaving me on a completely black screen. I've tried multiple different FHDB images and packs, and even tried low-level formatting the drive before everything else. I can't find anything at all pertaining to my problem anywhere on the internet.

The only...

FHDB won't even boot at all, PS2 just goes to black screen