Has she died? Is it hopeless? iMac 21.5″ 4K 2017
This old Intel gal might be on its last legs, but I want to be sure. I have done all the physical things—unplugged the iMac, all the peripherals, tested my power source (no problem there), waited etc., waited again, and have tried all these startup key combos—Recovery mode; Startup manager; Reset PRAM; Safe mode; Apple diagnostics utility—to no avail.
At least I have a backup, but I fear the worst—that I must plan a funeral.