You get video and an attempt to boot the hard drive? If you get video and it tries to boot the hard drive, then that means the drive has bad boot blocks. Disconnect the drive and see if it gives a flashing "?" in a floppy icon.

Mine only chimes and then nothing. Dark screen, no chimes of death and nothing happens. See for details: https://68kmla.org/forums/index.php?/topic/22427-macintosh-performa-475-chime-but-no-video/page-2&do=findComment&comment=251843