I recently did my first infinity and got a black screen after the installation. Everything I tried did not work - I used thicker wire, different chip placement and even another infinity chip. Still black screen. Eventually, I plugged in the joypad to see if that would help and it did! So, to me, this is a bug, the infinity will not boot without a joypad plugged in. I can live with this, but I wonder if this is known to the infinity developers.