Context: Just finished
dd'ing the Kali Linux image onto an SD card using the Raspberry Pi 2 Model B which was running Ubuntu Mate. I ejected the SD card and replaced it with the Ubuntu one. I plugged it in, it did not boot. I removed that one and re-inserted the Ubuntu SD card. The Pi did not boot. The red LED flashes, and the monitor reads:
My monitor is older, and uses VGA. I use a female-to-female HDMI to VGA adapter to connect the two. My Pi has done this before; it will refuse to boot until I plug it into another monitor, and then plug it into the original monitor.
Why won't it display on my monitor?