IMac G5 won't load in recovery mode
I have a 2005/2006 IMac G5. I started it up yesterday after a few years in the box. It started up fine, then I ran the updates. After the system shut down it did not restart. When I turn it on it come to the ? and folder screen. I've tried both recovery mode, and Internet recovery mode but it eventually ends up at the ? and folder screen, skipping the recovery mode screens. I have a external hd with time machine back ups. When I restart with the hard drive connected and hold in the option key a screen with a return arrows, and a forward arrow appears, but no drives show up above them. Any help is appreciated
iMac G5 (17-inch), null