Removed 250gb hdd that had a warning of impending disk failure. Installed a 1.5TB HDD, fans turn on, and a blank screen.
As it turned out, I found the problem to be a bad memory. What I did was re-install the old hard drive, still had the problem. I remembered I had this same problem years ago. I removed and tested each memory panel and found one bad.
I do want to thank you because I keep these suggestions in a card file.