I picked up this G5 a few months ago that had been sitting unplugged and unused for a year or more. It booted fine when I got it home, but the previous owner had not wiped the hard drive so I only got to the sign in page. I set it aside for a couple of months intending to wipe the hard drive and reinstall an OS.
Currently, when I power up the Mac the fans run at full speed immediately and the light on the lower right front panel is solid. The screen is black.
The power button is on the left rear and the I/O access is on the right and horizontal, if that makes any difference.
Open to suggestions on next steps.