So opened a log file (recalbox.log) in notepad++ and scanning through I found entries for 2 of the games I've tried. It starts /recalbox/share/roms/gba/castlevaniayadayada.zip (I'm typing this out so title paraphrased) It then says searching for game_hdmi_mode Powering on HDMI with explicit settings (CEA mode 4) Didn't read whole file: /sys/devices/system/cpu/present The next line says same for /cpu/possible Followed by a line of "null"   I hope this helps someone figure out what's happening. Its the only area in this log that indicates any sort of error sounding message.