So I picked up an iMac 12,1 yesterday for a song and dance that was said to have a bad hard drive as diagnosed by Apple tech support and a local computer shop. Ok, replace the drive and good to go, right? So far, so wrong. Nothing I have tried has allowed me to get an OS installed or running on this thing. When I got home with it, I removed the glass and started lifting the screen to find that the hard drive was missing (no big deal, I suppose). Long story short, I got the new SSD installed and reconnected a ribbon cable that the previous tech much have not reconnected. So my journey starts...I will list what I've tried as a list to make this as quick as possible: -reset PRAM -Tried installing various OS's from 10.6-10.13. All have various different stages of failure. For example, 10.8 gives me a blue screen with black lines while most others will get to about 3/4 to 2/3 of the boot progress bar then go to a white screen, reboot, then repeat. -Tried cloning the boot drive of my Macbook running High Sierra to an external hard drive then booting off that. Same thing, gets about 2/3 - 3/4 of the boot bar then repeat. -Tried booting into the "online" software restore (whatever it's called) failed out and gives me a white screen until I hard turn it off -Booted into hardware testing and tested: no errors found (didn't do extended test...yet) Any help or suggestions anyone can offer would be greatly appreciated!