Saw this on a Class 2 game after a SSD swap. No idea why or what was happening. We swapped the logic box which gave us a boot error. Installed the original logic box and remove the NV Ram battery for a few seconds to clear NVRam. Game booted to a 23.x error which is a standard ramclear. Red key the game two times and it rebooted to a Main door open. Closed the door and the game loaded and worked.
20 | 3 | CF Media missing | CF-Monitor plugin has detected that the flash media (CF or SSD) has been removed. The connector may have come loose. | Make sure media is installed properly and reboot cabinet. |