Boot Up Diagnostics (Mega CD) Updated Mar 15, 2026 · 9 min read · 0 viewing Log in or register to read the full article. Previous Side Connector (Sega Mega CD) The connector block that joins the Mega CD to the Mega Drive has several versions, and it must match... Next First Stage Boot (Mega CD) First stage boot is getting to the BIOS screen without any text displaying. This means the BIOS has ...