With nothing else connected to it, no expansion boards, floppy drives, mice or keyboard or anything at all but the power supply, I plugged it in and hooked up the b/w video output to a television. I turned it on but I got nothing. No signal or anything. The power LED did not even change brightness, it just turned on and stayed on. I was about to become dismayed, but then I thought that maybe all the socketed chips needed reseating. I turned the computer off and did just that. Every socketed chip made a slight creak as I pushed them down, gently but firmly, and I did so until they creaked no more!
I turned my Amiga 2000 back on. This time it actually came to life. The "Insert Workbench" screen came up, showing that it was running a Kickstart 3.1 ROM. Excellent!