A Geek Goes Flying

 D’oh. I'm an idiot. I’m rebuilding an old Hackintosh into an AI workstation . I pulled the motherboard from the old Corsair case, removed the Core i5 and 16GB RAM (4x4GB Corsair Vengeance sticks), and set everything up in the CoolerMaster case. Everything lined up nicely and, especially with the extra screws I got, it was an easy, straight forward build. I was confident when I hooked up to mains power everything would Just Work™. It didn’t. Pressed the power button and it seemed to be online: The fans were spinning, the NIC lights were dancing, the power LED was on, etc., but the connected monitor stubbornly reported it was not receiving any signal.  Back in the day, computer cases had a cheap speaker installed, looked something like this: Wikipedia photo of an old timey computer speaker But, no more. Starting with what the BIOS was able to tell me seemed like the natural first step, and Amazon enables almost immediate gratification (not as immediate as popping over to the ne...