So I had flashed UltraSlim to a microSD card, and upon first boot everything seemed to be working fine. Unfortunately the keyboard I was using at the time was not being recognized, so I pulled the power. After that it would not boot. My noobs card that came with the pi still works like a charm. I have since formatted and re flashed the image to the other sd card and nothing happens (green light flickers on and promptly turns off). I was able to format the SD card and flash openELEC and it ran flawlessly. Why can I not get UltraSlim to work again? It is the one image I have seen that I desperately want on my pi, and I have been working on it for about 3 hours but cannot even get it to boot.
tl;dr UltraSlim doesn't boot, but did boot at first. Am able to flash other images to same sd card and they work. Re-flashing UltraSlim doesn't work.