I was configuring a ssd on my pi4. All was working until I got a freeze. I powered off and I am not able to get things working again. I tried installing a new sd card, after a few green blinks only the red light stays on together with a black screen. I suspect the pi is still searching for the proper ssd. How can I go back to initial settings where the pi is booting from sd card so I can start all over again? This is in my opinion diiferent from a pi 3 since the pi 4 needs the sd as well as the ssd...
Thanks for your reply.
I did not gracefully power the system down... Took the power of because I had no icons in mys screen to operate the system (they all disappeared).
the new ssd is a wd green sata ssd 120 gb. Powered just buy the usb port. I installed raspbian with desktop. To configure the ssd I used the explanation of Tom's hardware site. https://www.tomshardware.com/news/boot-raspberry-pi-from-usb,39782.html
My thought was that when I just make a new install on a sd card I would be able to power up. This does not work. What lines are now still refering to the ssd? And how can I change these back to sd again? Or is something else the matter?
Also tried with a fresh card but after a few green blinks the green light stays off and only the red light is burning. I could not find helpful info in the sticky... My feeling is that somehow the boot is still redirecting to the non existing ssd...
PROBLEM SOLVED... i redownloaded the software and made a fresh sd, now it is booting.... Maybe the downloaded software was corrupted??? Anyhow thanks for thinking with me!