RPi 4 not booting, want Secure Boot

Thanks for suggestion @TheYoctoJester

  1. Gave try with uart adapter boot was successfull, but problem now with login credential incorrect used default raspberrypi4-64 login:pi and passwd: raspberry ,also as “root” without password still unsuccessfull, as suggested in this post here .

  2. As suggest generated the core-image-base still the device screen get blackout.