Are you using a proper power supply for the Pi4 ? Is this a new Pi4 board ? What devices did you connect to the Pi - mouse, keyboard, gamepad, etc. ?

If the cards are new and - seemingly - ok, then the problem may be with the power supply or the board. You can use the Imager to write the latest RaspiOS Lite image and see if with that image the system completes the 1st boot.