Turn on console and closing after opening screen coming dreamcast logo anddd poff goes all screnn blink ligt. Try another PSU try another gdrom unit or HDD gdrom unit but not change Any one just blinking light i waiting a bit and open comes screen and goes all instat crazy paradox...bios mode on HDD grom on its all pls help me ty all regard.
Video
https://youtu.be/5EF5aE79nkQ