@Lucia-Touma since you have the expansion dock you can set up a serial terminal to sorta watch what is happening at the boot. plug in a usb cable that has micro b male into the micro b female receptacle on the board and then plug in the usb a male to a computer with a usb a female receptacle. then open a terminal app like putty or minicom, etc. then read these pages . now, i am thinking you may have a damaged bootloader, but fist try the serial device at boot to see if you can get any info on the state of the omega. make sure that you have all the necessary drivers installed to obtain a serial connection.