I had the same issue happen. It was right after I scanned new roms, then performed a reboot. White screen on reboot. I went in and set HDMI to safe mode. Rebooted and changed from Zoid to default. Then edited the safe mode back to normal. Working fine under the default theme. Definitely an issue within Zoid theme. Edit: had 42% of disk space used. Space not my issue. ~Kryptto